Battle of Britain
|Battle of Britain|
|Part of the Second World War|
An Observer Corps spotter
scans the skies of London
| United Kingdom
(including the incorporated air forces)[nb 2]:
|Commanders and leaders|
| Winston Churchill
(Prime Minister of the United Kingdom)
William Lyon Mackenzie King
(Prime Minister of Canada)
L. Samuel Breadner
| Adolf Hitler
(Führer of Germany)
(Prime Minister of Italy)
| Royal Air Force
23x15px Royal Canadian
|1,963 serviceable aircraft [nb 5]||
2,550 serviceable aircraft. [nb 6][nb 7]
|Casualties and losses|
|544 aircrew (RAF Fighter Command), 718 (RAF Bomber Command), 280 (RAF Coastal Command) killed
422 aircrew wounded
1,547 aircraft destroyed[nb 8]
|2,698 aircrew killed
638 missing bodies identified by British authorities
1,887 aircraft destroyed[nb 9]
|Around 90,000 civilian casualties, 40,000 of them fatal.|
The Battle of Britain (German: Luftschlacht um England, literally "Air battle for England") is the name given to the Second World War defence of the United Kingdom by the Royal Air Force (RAF) against an onslaught by the German Air Force (Luftwaffe) which began at the end of June 1940. In Britain, the officially recognised dates are 10 July – 31 October 1940, overlapping with the period of large-scale night attacks known as The Blitz. German historians do not accept this subdivision, and regard the Luftschlacht um England as a campaign lasting from July 1940 to June 1941. The Battle of Britain has been described as the first major campaign to be fought entirely by air forces.
The objective of the Nazi German forces was to increase pressure on Britain to agree to a negotiated peace settlement. An air and sea blockade began in July 1940, with coastal shipping convoys, ports and shipping centres such as Portsmouth the main targets of the Luftwaffe. A direction issued on 1 August for the Luftwaffe's Adlertag campaign to achieve air superiority over the Royal Air Force (RAF) with the aim of incapacitating RAF Fighter Command, and shifted attacks to RAF airfields and infrastructure. As the battle progressed, the Luftwaffe also targeted factories involved in World War II aircraft production and ground infrastructure. Eventually the Luftwaffe resorted to attacking areas of political significance and using terror bombing strategy.[nb 10]
By preventing Germany from gaining air superiority, the British forced Adolf Hitler to postpone and eventually cancel Operation Sea Lion, a planned amphibious and airborne invasion of Britain. However, Germany continued bombing operations on Britain, known as The Blitz. The failure of Nazi Germany to achieve its objective of destroying Britain's air defences in order to force Britain to negotiate an armistice (or even surrender outright) is considered by Steven Bungay to be its first major defeat in World War II, and a crucial turning point in the conflict.
The Battle of Britain has an unusual distinction in that it gained its name prior to being fought. The name is derived from a famous speech delivered by Prime Minister Winston Churchill in the House of Commons on 18 June, more than three weeks prior to the generally accepted date for the start of the battle:
... What General Weygand has called The Battle of France is over. The battle of Britain is about to begin. Upon this battle depends the survival of Christian civilisation. Upon it depends our own British life and the long continuity of our institutions and our Empire. The whole fury and might of the enemy must very soon be turned on us. Hitler knows that he will have to break us in this island or lose the war. If we can stand up to him, all Europe may be free and the life of the world may move forward into broad, sunlit uplands. But if we fail, then the whole world, including the United States, including all that we have known and cared for, will sink into the abyss of a new Dark Age made more sinister, and perhaps more protracted, by the lights of a perverted science. Let us therefore brace ourselves to our duties, and so bear ourselves that, if the British Empire and its Commonwealth last for a thousand years, men will still say, "This was their finest hour".— Winston Churchill
- 1 Background
- 2 Opposing forces
- 3 Luftwaffe strategy
- 4 RAF strategy
- 5 Phases of the battle
- 6 Attrition statistics
- 7 Aftermath
- 8 Battle of Britain Day
- 9 Memorials and museums
- 10 Film
- 11 See also
- 12 Notes
- 13 References
- 14 Bibliography
- 15 External links
Strategic bombing during World War I introduced air attacks intended to panic civilian targets, and led in 1918 to the amalgamation of British army and navy air services into the Royal Air Force. Its first Chief of the Air Staff Hugh Trenchard was among the military strategists in the 1920s like Giulio Douhet who saw air warfare as a new way to overcome the stalemate of trench warfare. Interception was near impossible with fighter planes no faster than bombers. Their view (expressed vividly in 1932) was that the bomber will always get through, and the only defence was a deterrent bomber force capable of matching retaliation. Predictions were made that a bomber offensive would quickly cause thousands of deaths and civilian hysteria leading to capitulation, but widespread pacifism contributed to a reluctance to provide resources.
Developing air strategies
Germany was forbidden military air forces by the 1919 Treaty of Versailles, but developed aircrew training in civilian and sport flying. From 1923 the Deutsche Luft Hansa airline developed freight aeroplanes convertible into bombers, and in 1926 the secret Lipetsk fighter-pilot school began operating. Erhard Milch organised rapid expansion, and following the 1933 Nazi seizure of power his subordinate Robert Knauss formulated a deterrence theory incorporating Douhet's ideas and Tirpitz's "risk theory", which proposed a fleet of heavy bombers to deter a preventive attack by France and Poland before Germany could fully rearm. A winter 1933–34 war game indicated a need for fighters and anti-aircraft protection as well as bombers. On 1 March 1935 the Luftwaffe was formally announced, with Walther Wever as Chief of Staff. The 1935 Luftwaffe doctrine for "Conduct of the Air War" (Die Luftkriegführung) set airpower within the overall military strategy, with critical tasks of attaining (local and temporary) air superiority and providing battlefield support for army and naval forces. Strategic bombing of industries and transport could be decisive longer term options, dependent on opportunity or preparations by the army and navy, to overcome a stalemate or used when only destruction of the enemy's economy would be conclusive. The list excluded bombing civilians to destroy homes or undermine morale, as that was considered a waste of strategic effort, but the doctrine allowed revenge attacks if German civilians were bombed. A revised edition was issued in 1940, and the continuing central principle of Luftwaffe doctrine was that destruction of enemy armed forces was of primary importance.
The RAF responded to Luftwaffe developments with its 1934 Expansion Plan A rearmament scheme, and in 1936 it was restructured into Bomber Command, Coastal Command, Training Command and Fighter Command. The latter was under Hugh Dowding, who opposed the doctrine that bombers were unstoppable: the invention of radar at that time could allow early detection, and prototype monoplane fighters were significantly faster. Priorities were disputed, but in December 1937 the Minister in charge of defence coordination Sir Thomas Inskip decided in Dowding's favour, that "The role of our air force is not an early knock-out blow" but rather was "to prevent the Germans from knocking us out" and fighter squadrons were just as necessary as bomber squadrons.
In the Spanish Civil War, the Luftwaffe in the Condor Legion tried out air fighting tactics and their new aeroplanes. Wolfram von Richthofen become an exponent of air power providing ground support to other services. The difficulty of accurately hitting targets prompted Ernst Udet to require that all new bombers had to be dive bombers, and led to the development of the Knickebein system for night time navigation. Priority was given to producing large numbers of smaller aeroplanes, and plans for a long range four engined strategic bomber were delayed.
First stages of World War II
The early stages of World War II saw successful German invasions on the continent aided decisively by the air power of the Luftwaffe, which was able to establish tactical air superiority with great efficiency. The speed with which German forces defeated most of the defending armies in Norway in early 1940 created a significant political crisis in Britain. In early May 1940, the Norway Debate questioned the fitness for office of the British Prime Minister Neville Chamberlain. On 10 May, the same day Winston Churchill became British Prime Minister, the Germans initiated the Battle of France with an aggressive invasion of French territory. RAF Fighter Command was desperately short of trained pilots and aircraft, but despite the objections of its commander Hugh Dowding that the diversion of his forces would leave home defences under-strength, Churchill sent fighter squadrons to support operations in France, where the RAF suffered heavy losses.
After the evacuation of British and French soldiers from Dunkirk and the French surrender on 22 June 1940, Hitler mainly focused his energies on the possibility of invading the Soviet Union in the belief that the British, defeated on the continent and without European allies, would quickly come to terms. The Germans were so convinced of an imminent armistice that they began constructing street decorations for the homecoming parades of victorious troops. Although the British Foreign Secretary, Lord Halifax, and certain elements of the British public favoured a negotiated peace with an ascendant Germany, Churchill and a majority of his Cabinet refused to consider an armistice. Instead, Churchill used his skilful rhetoric to harden public opinion against capitulation and to prepare the British for a long war. In his "This was their finest hour" speech of 18 June 1940, he declared that "the Battle of France is over. I expect that the Battle of Britain is about to begin."
German aims and directives
From the outset of his rise to power, Hitler expressed admiration for Britain, and throughout the Battle period he sought neutrality or a peace treaty with Britain. In secret conference on 23 May 1939 Hitler set out his rather contradictory strategy that an attack on Poland was essential and "will only be successful if the Western Powers keep out of it. If this is impossible, then it will be better to attack in the West and to settle Poland at the same time" with a surprise attack. "If Holland and Belgium are successfully occupied and held, and if France is also defeated, the fundamental conditions for a successful war against England will have been secured. England can then be blockaded from Western France at close quarters by the Air Force, while the Navy with its submarines extend the range of the blockade."
When war commenced, Hitler and the OKW (Oberkommando der Wehrmacht or "High Command of the Armed Forces") issued a series of Directives ordering planning and stating strategic objectives. "Directive No. 1 for the Conduct of the War" dated 31 August 1939 instructed the invasion of Poland on 1 September as planned. Potentially, Luftwaffe "operations against England" were to "dislocate English imports, the armaments industry, and the transport of troops to France. Any favourable opportunity of an effective attack on concentrated units of the English Navy, particularly on battleships or aircraft carriers, will be exploited. The decision regarding attacks on London is reserved to me. Attacks on the English homeland are to be prepared, bearing in mind that inconclusive results with insufficient forces are to be avoided in all circumstances." Both France and the UK declared war on Germany, and on 9 October Hitler's "Directive No. 6" planned the offensive to defeat these allies and "win as much territory as possible in Holland, Belgium, and northern France to serve as a base for the successful prosecution of the air and sea war against England". On 29 November OKW "Directive No. 9 – Instructions For Warfare Against The Economy Of The Enemy" stated that once this coastline had been secured, the Lufwaffe and Kriegsmarine (German Navy) was to blockade UK ports with sea mines, attack shipping and warships, and make air attacks on shore installations and industrial production. This directive remained in force in the first phase of the Battle of Britain. It was reinforced on 24 May during the Battle of France by "Directive No. 13" which authorised the Luftwaffe "to attack the English homeland in the fullest manner, as soon as sufficient forces are available. This attack will be opened by an annihilating reprisal for English attacks on the Ruhr Basin."
By the end of June 1940, Germany had defeated Britain's allies on the continent, and on 30 June the OKW Chief of Staff Alfred Jodl issued his review of options to increase pressure on Britain to agree to a negotiated peace. The first priority was to eliminate the RAF and gain air supremacy. Intensified air attacks against shipping and the economy could affect food supplies and civilian morale in the long term. Reprisal attacks of terror bombing had the potential to cause quicker capitulation but the effect on morale was uncertain. Once the Luftwaffe had control of the air, and the UK economy had been weakened, an invasion would be a last resort or a final strike ("Todesstoss") after England had already been conquered, but could have a quick result. On the same day, the Luftwaffe Commander-in-Chief Hermann Göring issued his operational directive; to destroy the RAF, thus protecting German industry, and also to block overseas supplies to Britain. The German Supreme Command argued over the practicality of these options.
In "Directive No. 16 – On preparations for a landing operation against England" on 16 July, Hitler required readiness by mid-August for the possibility of an invasion he called Operation Sea Lion, unless the British agreed to negotiations. The Luftwaffe reported that it would be ready to launch its major attack early in August. The Kriegsmarine Commander-in-Chief, Grand Admiral Erich Raeder, continued to highlight the impracticality of these plans, and said sea invasion could not take place before the Spring of 1941. Hitler now argued that Britain was holding out in hope of assistance from Russia, and the Soviet Union was to be invaded by mid 1941.
Hitler's "Directive No. 17 – For the conduct of air and sea warfare against England" issued on 1 August attempted to keep all the options open. The Luftwaffe's Adlertag campaign was to start around 5 August, subject to weather, with the aim of gaining air superiority over southern England as a necessary precondition of invasion, to give credibility to the threat and give Hitler the option of ordering the invasion. The intention was to incapacitate the RAF so much that the UK would feel open to air attack, and would begin peace negotiations. It was also to isolate the UK and damage war production, beginning an effective blockade.
Negotiated peace or neutrality
Adolf Hitler's Mein Kampf of 1923 mostly set out his hatreds: he only admired ordinary German World War I soldiers, and Britain which he saw as an ally against communism. In 1935 Hermann Göring welcomed news that Britain as a potential ally was rearming. In 1936 he promised assistance to defend the British Empire, asking only a free hand in Eastern Europe, and repeated this to Lord Halifax in 1937. That year, von Ribbentrop met Churchill with a similar proposal, when rebuffed he told Churchill that interference with German domination would mean war. To Hitler's great annoyance, all his diplomacy failed to stop Britain declaring war when he invaded Poland. During the fall of France, he repeatedly discussed peace efforts with his generals.
When Churchill came to power, there was still wide support for Halifax who as Foreign Secretary openly argued for peace negotiations in the tradition of British diplomacy, to secure British independence without war. On 20 May, Halifax secretly requested a Swedish businessman to make contact with Göring to open negotiations. Shortly afterwards in the May 1940 War Cabinet Crisis Halifax argued for negotiations involving the Italians, but this was rejected by Churchill with majority support. An approach made through the Swedish ambassador on 22 June was reported to Hitler, making peace negotiations seem feasible. Throughout July, as the battle started, the Germans made wider attempts to find a diplomatic solution. On 2 July, the day the armed forces were asked to start preliminary planning for an invasion, Hitler got von Ribbentrop to draft a speech offering peace negotiations. On 19 July Hitler made this speech to the German Parliament in Berlin, appealing "to reason and common sense", and said he could "see no reason why this war should go on". His sombre conclusion was received in silence, but he did not suggest negotiations and this was effectively an ultimatum which was rejected by the British government. Halifax kept trying to arrange peace until he was sent to Washington in December as ambassador, and in January 1941 Hitler expressed continued interest in negotiating peace with Britain.
Blockade and siege
A 22 September 1938 study by General Hellmuth Felmy indicated that a strategic Luftwaffe assault on the UK could not be decisive, and a May 1939 planning exercise by Luftflotte 3 found they were not ready to do much damage Britain's war economy, beyond laying naval mines. Once Britain and France declared war, Hitler was concerned that resources would be overstretched: his "Directive No. 6" proposed a swift attack, but his generals needed more time to prepare their forces.
The Head of Luftwaffe intelligence by Joseph "Beppo" Schmid presented a report on 22 November 1939, stating that "Of all Germany's possible enemies, Britain is the most dangerous." This "Proposal for the Conduct of Air Warfare" argued for a counter to the British blockade and said "Key is to paralyse the British trade". Instead of the Wehrmacht attacking the French, the Luftwaffe with naval assistance was to block imports to Britain and attack seaports. "Should the enemy resort to terror measures--for example, to attack our towns in western Germany" they could retaliate by bombing industrial centres and London. Parts of this appeared on 29 November in "Directive No. 9" as future actions once the coast had been conquered. On 24 May 1940 "Directive No. 13" authorised attacks on the blockade targets, as well as retaliation for RAF bombing of the Ruhr. After the defeat of France the High Command (OKW) felt they had won the war, and some more pressure would persuade Britain. On 30 June the OKW Chief of Staff Alfred Jodl issued his paper setting out options: the first was to increase attacks on shipping, economic targets and the RAF: air attacks and food shortages were expected to break morale and lead to capitulation. Terror bombing of civilians could be considered, and invasion would be a last resort. Destruction of the RAF was the first priority. Hermann Göring's operational directive issued the same day authorised redeployment of the Luftwaffe and intensified attacks with the main emphasis on destruction of the RAF. They were to block seaborne supplies to Britain, there was no mention of invasion.
In November 1939 the OKW reviewed the potential for an air and seaborne invasion of Britain: the Kriegsmarine (German Navy) was faced with the threat the Royal Navy's larger Home Fleet posed to a crossing of the English Channel, and together with the German Army viewed control of airspace as a necessary precondition. The Luftwaffe said that "total air superiority" and "total surprise" was needed, and an invasion could only be "the final act in an already victorious war."
During the Battle of France, Grand Admiral Erich Raeder, met Hitler on 21 May 1940 and raised the topic of invasion, stressing the difficulties and his own preference for a blockade. The report issued on 30 June by OKW Chief of Staff Alfred Jodl 30 June set out options, with invasion as a last resort once the British economy had been damaged and the Luftwaffe had full air superiority. Raeder emphasised that the Kriegsmarine had been considerably weakened by the Norwegian Campaign.[nb 11] It would be unable to stop the relatively intact Royal Navy from breaking up an invasion fleet, though the Luftwaffe "might create conditions favourable for an invasion, whether it could was not in the Navy War Staff's province."
By then the British were already preparing their defences, and in Churchill's view "the great invasion scare" was "serving a very useful purpose" by "keeping every man and woman tuned to a high pitch of readiness". He did not think the threat likely. On 10 July he advised the War Cabinet that invasion could be ignored, as it "would be a most hazardous and suicidal operation". That summer, Britain exported tanks to the campaign in Egypt.
On 11 July Raeder got Hitler's agreement that invasion would be a last resort, and on the same day the Luftwaffe advised the OKW that getting air superiority would take 14 to 28 days. Two days later Hitler met his army chiefs von Brauchitsch and Halder who presented detailed plans on the assumption that the navy would provide safe transport. Against his previous practice, Hitler showed no interest in the details, but said preparations were to begin. On 16 July Hitler issued "Directive No. 16 – On the Preparation of a Landing Operation against England" described the UK's position as "militarily hopeless", but as they still had "not shown any signs of being prepared to negotiate, I have decided to prepare a landing operation against England and, if necessary, carry it out" with the objective of eliminating the UK "as a base for the continuation of the war against Germany". As a precondition, "The English air force must have been beaten down to such an extent morally and in fact that it can no longer muster any power of attack worth mentioning against the German crossing."[nb 12]
The Kriegsmarine produced a draft plan for achieving a narrow beachhead near Dover. On 28 July the army responded that they wanted landings all along the south coast of England. Hitler held a meeting of his army and navy chiefs on 31 July in his residence of Berghof, and on 1 August the OKW (Oberkommando der Wehrmacht or "High Command of the Armed Forces") issued its plan. The plan, code named Operation Sea Lion, was scheduled to take place in mid-September 1940. Operation Sea Lion called for landings on the south coast of Great Britain backed by an airborne assault. Neither Hitler nor OKW believed it would be possible to carry out a successful amphibious assault on Britain until the RAF had been overcome. Raeder believed that air superiority might make a successful landing possible although it would be a risky operation and require "absolute mastery over the Channel by our air forces".
In retrospect, Grand Admiral Karl Dönitz said that "we possessed neither control of the air or the sea; nor were we in any position to gain it." Historians have concurred with the assessment of Raeder and Dönitz.
The Luftwaffe had not been represented at the Berghof, but Göring was confident that air victory was possible. Like many commanders in other air forces, including the RAF, he was convinced by the ideas of Giulio Douhet that if attacks on military targets failed, the bombing of civilians could force the British government to surrender.
The Luftwaffe faced a more capable opponent than any it had previously met: a sizeable, highly coordinated, well-supplied, modern air force.
The Luftwaffe's Messerschmitt Bf 109E and Bf 110C fought against the RAF's workhorse Hurricane Mk I and the less numerous Spitfire Mk I; Hurricanes outnumbered Spitfires in RAF Fighter Command by about 2:1 when war broke out. The Bf 109E had a better climb rate and was up to 40 mph faster in level flight than the Rotol (constant speed propellor) equipped Hurricane Mk I, depending on altitude. The speed and climb disparity with the original non-Rotol Hurricane was even greater. By the end of spring 1940, all RAF Spitfire and Hurricane fighter squadrons converted to 100 octane aviation fuel, which allowed their Merlin engines to generate significantly more power and an approximately 30 mph increase in speed at low altitudes through the use of an Emergency Boost Override. In September 1940, the more powerful Mk IIa series 1 Hurricanes started entering service in small numbers. This version was capable of a maximum speed of 342 mph (550 km/h), some 20 mph more than the original (non-Rotol) Mk I, though it was still 15 to 20 mph slower than a Bf 109 (depending on altitude).
The performance of the Spitfire over Dunkirk came as a surprise to the Jagdwaffe, although the German pilots retained a strong belief that the 109 was the superior fighter. The British fighters were equipped with eight Browning .303 (7.7mm) machine guns, while most Bf 109Es had two 7.92mm machine guns supplemented by two 20mm cannons.[nb 13] The latter was much more effective than the .303; many German planes landed despite large numbers of .303 hits. At some altitudes, the Bf 109 could outclimb the British fighter. It could also engage in vertical-plane negative-g manoeuvres without the engine cutting out because its DB 601 engine used fuel injection; this allowed the 109 to dive away from attackers more readily than the carburettor-equipped Merlin. On the other hand, the Bf 109E had a much larger turning circle than its two foes. In general, though, as Alfred Price noted in The Spitfire Story:
... the differences between the Spitfire and the Me 109 in performance and handling were only marginal, and in a combat they were almost always surmounted by tactical considerations of which side had seen the other first, which had the advantage of sun, altitude, numbers, pilot ability, tactical situation, tactical co-ordination, amount of fuel remaining, etc.
The Bf 109E was also used as a Jabo (jagdbomber, fighter-bomber)—the E-4/B and E-7 models could carry a 250 kg bomb underneath the fuselage, the later model arriving during the battle. The Bf 109, unlike the Stuka, could fight on equal terms with RAF fighters after releasing its ordnance.
At the start of the battle, the twin-engined Messerschmitt Bf 110C long range Zerstörer ("Destroyer") was also expected to engage in air-to-air combat while escorting the Luftwaffe bomber fleet. Although the 110 was faster than the Hurricane and almost as fast as the Spitfire, its lack of manoeuvrability and acceleration meant that it was a failure as a long-range escort fighter. On 13 and 15 August, 13 and 30 aircraft were lost, the equivalent of an entire Gruppe, and the type's worst losses during the campaign. This trend continued with a further eight and fifteen lost on 16 and 17 August. Göring ordered the Bf 110 units to operate "where the range of the single-engined machines were not sufficient".
The most successful role of the Bf 110 during the battle was as a Schnellbomber (fast bomber). The Bf 110 usually used a shallow dive to bomb the target and escape at high speed. One unit, Erprobungsgruppe 210 – initially formed as the service test unit (Erprobungskommando) for the emerging successor to the 110, the Me 210 – proved that the Bf 110 could still be used to good effect in attacking small or "pinpoint" targets.
The RAF's Boulton Paul Defiant had some initial success over Dunkirk because of its resemblance to the Hurricane; Luftwaffe fighters attacking from the rear were surprised by its unusual gun turret. However, during the Battle of Britain, this single-engined two-seater proved hopelessly outclassed. For various reasons, the Defiant lacked any form of forward-firing armament, and the heavy turret and second crewman meant it could not outrun or outmanoeuvre either the Bf 109 or Bf 110. By the end of August, after disastrous losses, the aircraft was withdrawn from daylight service.
The Luftwaffe's primary bombers were the Heinkel He 111, Dornier Do 17, and Junkers Ju 88 for level bombing at medium to high altitudes, and the Junkers Ju 87 Stuka for dive bombing tactics. The He 111 was used in greater numbers than the others during the conflict, and was better known, partly due to its distinctive wing shape. Each level bomber also had a few reconnaissance versions accompanying them that were used during the battle.
Although it was successful in previous Luftwaffe engagements, the Stuka suffered heavy losses in the Battle of Britain, particularly on 18 August, due to its slow speed and vulnerability to fighter interception after dive bombing a target. As the losses went up along with their limited payload and range, Stuka units were largely removed from operations over England and diverted to concentrate on shipping instead until they were eventually re-deployed to the Eastern Front in 1941. However, for some raids, they were called back, such as on 13 September to attack Tangmere airfield.
The remaining three bomber types differed in their capabilities; the Heinkel 111 was the slowest; the Ju 88 was the fastest once its mainly external bomb load was dropped; and the Do 17 had the smallest bomb load. All three bomber types suffered heavy losses from the home-based British fighters, but the Ju 88 disproportionately so. The German bombers required constant protection by the Luftwaffe's fighter force. German escorts, however, were not enough. Bf 109Es were ordered to support more than 300–400 bombers on any given day. Later in the conflict, when night bombing became more frequent, all three were used. However, due to its reduced bomb load, the lighter Do 17 was used less than the He 111 and Ju 88 for this purpose.
On the British side, three bomber types were mostly used on night operations against targets such as factories, invasion ports and railway centres; the Armstrong Whitworth Whitley, the Handley-Page Hampden and the Vickers Wellington were classified as heavy bombers by the RAF, although the Hampden was a medium bomber comparable to the He 111. The twin-engined Bristol Blenheim and the obsolescent single-engined Fairey Battle were both light bombers; the Blenheim was the most numerous of the aircraft equipping RAF Bomber Command and was used in attacks against shipping, ports, airfields and factories on the continent by day and by night. The Fairey Battle squadrons, which had suffered heavy losses in daylight attacks during the Battle of France, were brought up to strength with reserve aircraft and continued to operate at night in attacks against the invasion ports, until the Battle was withdrawn from UK front line service in October 1940.
Before the war, the RAF's processes for selecting potential candidates were opened to men of all social classes through the creation in 1936 of the RAF Volunteer Reserve, which "... was designed to appeal, to ... young men ... without any class distinctions ..." The older squadrons of the Royal Auxiliary Air Force did retain some of their upper-class exclusiveness, but their numbers were soon swamped by the newcomers of the RAFVR; by 1 September 1939, 6,646 pilots had been trained through the RAFVR.
By summer 1940, there were about 9,000 pilots in the RAF to man about 5,000 aircraft, most of which were bombers. Fighter Command was never short of pilots, but the problem of finding sufficient numbers of fully trained fighter pilots became acute by mid-August 1940. With aircraft production running at 300 planes each week, only 200 pilots were trained in the same period. In addition, more pilots were allocated to squadrons than there were aircraft, as this allowed squadrons to maintain operational strength despite casualties and still provide for pilot leave. Another factor was that only about 30% of the 9,000 pilots were assigned to operational squadrons; 20% of the pilots were involved in conducting pilot training, and a further 20% were undergoing further instruction, like those offered in Canada and in Southern Rhodesia to the Commonwealth trainees, although already qualified. The rest were assigned to staff positions, since RAF policy dictated that only pilots could make many staff and operational command decisions, even in engineering matters. At the height of fighting, and despite Churchill's insistence, only 30 pilots were released to the front line from administrative duties.[nb 15]
For these reasons, and the permanent loss of 435 pilots during the Battle of France alone along with many more wounded, and others lost in Norway, the RAF had fewer experienced pilots at the start of the initial defence of their home. It was the lack of trained pilots in the fighting squadrons, rather than the lack of aircraft, that became the greatest concern for Air Chief Marshal Hugh Dowding, Commander of Fighter Command. Drawing from regular RAF forces, the Auxiliary Air Force and the Volunteer Reserve, the British were able to muster some 1,103 fighter pilots on 1 July. Replacement pilots, with little flight training and often no gunnery training, suffered high casualty rates, thus exacerbating the problem.
The Luftwaffe, on the other hand, were able to muster a larger number (1,450) of more experienced fighter pilots. Drawing from a cadre of Spanish Civil War veterans, these pilots already had comprehensive courses in aerial gunnery and instructions in tactics suited for fighter-versus-fighter combat. Training manuals discouraged heroism, stressing the importance of attacking only when the odds were in the pilot's favour. Despite the high levels of experience, German fighter formations did not provide a sufficient reserve of pilots to allow for losses and leave, and the Luftwaffe was unable to produce enough pilots to prevent a decline in operational strength as the battle progressed.
The Royal Air Force roll of honour for the Battle of Britain recognises 595 non-British pilots (out of 2,936) as flying at least one authorised operational sortie with an eligible unit of the RAF or Fleet Air Arm between 10 July and 31 October 1940. These included 145 Poles, 127 New Zealanders, 112 Canadians, 88 Czechoslovaks, 10 Irish, 32 Australians, 28 Belgians, 25 South Africans, 13 French, 7 Americans, 3 Southern Rhodesians and one each from Jamaica and Mandatory Palestine. "Altogether in the fighter battles, the bombing raids, and the various patrols flown between 10 July and 31 October 1940 by the Royal Air Force, 1495 aircrew were killed, of whom 449 were fighter pilots, 718 aircrew from Bomber Command, and 280 from Coastal Command. Among those killed were 47 airmen from Canada, 24 from Australia, 17 from South Africa, 35 from Poland, 20 from Czechoslovakia and six from Belgium. Forty-seven New Zealanders lost their lives, including 15 fighter pilots, 24 bomber and eight coastal aircrew. The names of these Allied and Commonwealth airmen are inscribed in a memorial book which rests in the Battle of Britain Chapel in Westminster Abbey. In the chapel is a stained glass window which contains the badges of the fighter squadrons which operated during the battle and the flags of the nations to which the pilots and aircrew belonged."
An element of the Italian Royal Air Force (Regia Aeronautica) called the Italian Air Corps (Corpo Aereo Italiano or CAI) first saw action in late October 1940. It took part in the latter stages of the battle, but achieved limited success. The unit was redeployed in early 1941.
The Luftwaffe strategy was devised to provide tactical support for the army on the battlefield. During the blitzkrieg offensives against Poland, Denmark and Norway, France and the Low Countries, the Luftwaffe had co-operated fully with the Wehrmacht. Its main task was to ensure air supremacy over southeast England, to pave the way for an invasion fleet. To achieve air supremacy, the Luftwaffe resorted to bombing British air fields. Unlike British (and U.S.) air forces, the Luftwaffe had not invested in fleets of long-range heavy bombers, so the task of bombing was made much more difficult.
Heavy losses in Holland
Unknown to the British because of the chaos of war, the Luftwaffe had suffered very heavy losses during their attack on the Netherlands, losing 64 fighters, 276 transport planes and various other aircraft for a total of 525 lost in just four days in May, due to fierce Dutch anti-aircraft defences that the Luftwaffe had grossly underestimated. Generalfeldmarschall Albert Kesselring acknowledged the influence of these losses on the Battle of Britain when questioned about them by Dutch military a decade after the war. Not only had hundreds of military aircraft been put out of service, but many aircrew were lost. Without a large fleet of military transport aircraft, Germany was unable to launch a massive air invasion using paratroopers (the Fallschirmjäger), and was also unable to plan large-scale resupply of an invasion army. This setback put a greater responsibility on the German Navy.
Regrouping of Luftwaffe in Luftflotten
The Luftwaffe was forced to regroup after the Battle of France into three Luftflotten (Air Fleets) on Britain's southern and northern flanks. Luftflotte 2, commanded by Generalfeldmarschall Albert Kesselring, was responsible for the bombing of southeast England and the London area. Luftflotte 3, under Generalfeldmarschall Hugo Sperrle, targeted the West Country, Wales, the Midlands, and northwest England. Luftflotte 5, led by Generaloberst Hans-Jürgen Stumpff from his headquarters in Norway, targeted the north of England and Scotland. As the battle progressed, command responsibility shifted, with Luftflotte 3 taking more responsibility for the night-time Blitz attacks while the main daylight operations fell upon Luftflotte 2's shoulders.
Initial Luftwaffe estimates were that it would take four days to defeat the RAF Fighter Command in southern England. This would be followed by a four-week offensive during which the bombers and long-range fighters would destroy all military installations throughout the country and wreck the British aircraft industry. The campaign was planned to begin with attacks on airfields near the coast, gradually moving inland to attack the ring of sector airfields defending London. Later reassessments gave the Luftwaffe five weeks, from 8 August to 15 September, to establish temporary air superiority over England. To achieve this goal, Fighter Command had to be destroyed, either on the ground or in the air, yet the Luftwaffe had to be able to preserve its own strength to be able to support the invasion; this meant that the Luftwaffe had to maintain a high "kill ratio" over the RAF fighters. The only alternative to the goal of air superiority was a terror bombing campaign aimed at the civilian population, but this was considered a last resort and it was (at this stage of the battle) expressly forbidden by Hitler.
The Luftwaffe kept broadly to this scheme, but its commanders had differences of opinion on strategy. Sperrle wanted to eradicate the air defence infrastructure by bombing it. His counterpart, Kesselring, championed attacking London directly— either to bombard the British government into submission, or to draw RAF fighters into a decisive battle. Göring did nothing to resolve this disagreement between his commanders, and only vague directives were set down during the initial stages of the battle, with Göring seemingly unable to decide upon which strategy to pursue. He seemed at times obsessed with maintaining his own power base in the Luftwaffe and indulging his outdated beliefs on air fighting, which would later lead to tactical and strategic errors.
Luftwaffe formations employed a loose section of two (nicknamed the Rotte), based on a leader (Rottenführer) followed at a distance of about 200 metres[nb 16] by his wingman (nicknamed the Rottenhund or Katschmareks), who also flew slightly higher and was trained always to stay with his leader. With more room between them, both pilots could spend less time maintaining formation and more time looking around and covering each other's blind spots. Attacking aircraft could be sandwiched between the two 109s. [nb 17] The Rotte allowed the Rottenführer to concentrate on getting kills, but few wingmen had the chance, leading to some resentment in the lower ranks where it was felt that the high scores came at their expense. Two sections were usually teamed up into a Schwarm, where all the pilots could watch what was happening around them. Each Schwarm in a Staffel flew at staggered heights and with about 200 metres of room between them, making the formation difficult to spot at longer ranges and allowing for a great deal of flexibility. By using a tight "cross-over" turn, a Schwarm could quickly change direction.
The Bf 110s adopted the same Schwarm formation as the 109s, but were seldom able to use this to the same advantage. The Bf 110's most successful method of attack was the "bounce" from above. When attacked, Zerstörergruppen increasingly resorted to forming large "defensive circles", where each Bf 110 guarded the tail of the aircraft ahead of it. Göring ordered that they be renamed "offensive circles" in a vain bid to improve rapidly declining morale. These conspicuous formations were often successful in attracting RAF fighters that were sometimes "bounced" by high-flying Bf 109s. This led to the often repeated misconception that the Bf 110s were escorted by Bf 109s.
Luftwaffe tactics were influenced by their fighters. The Bf 110 proved too vulnerable to the nimble single-engined RAF fighters. This meant the bulk of fighter escort duties fell on the Bf 109. Fighter tactics were then complicated by bomber crews who demanded closer protection. After the hard-fought battles of 15 and 18 August, Göring met with his unit leaders. During this conference, the need for the fighters to meet up on time with the bombers was stressed. It was also decided that one bomber Gruppe could only be properly protected by several Gruppen of 109s. In addition, Göring stipulated that as many fighters as possible were to be left free for Freie Jagd ("Free Hunts": a free-roving fighter sweep preceded a raid to try to sweep defenders out of the raid's path). The Ju 87 units, which had suffered heavy casualties, were only to be used under favourable circumstances. In early September, due to increasing complaints from the bomber crews about RAF fighters seemingly able to get through the escort screen, Göring ordered an increase in close escort duties. This decision shackled many of the Bf 109s to the bombers and, although they were more successful at protecting the bomber forces, casualties amongst the fighters mounted primarily because they were forced to fly and manoeuvre at reduced speeds.
The Luftwaffe consistently varied its tactics in its attempts to break through the RAF defences. It launched many Freie Jagd to draw up RAF fighters. RAF fighter controllers, however, were often able to detect these and position squadrons to avoid them, keeping to Dowding's plan to preserve fighter strength for the bomber formations. The Luftwaffe also tried using small formations of bombers as bait, covering them with large numbers of escorts. This was more successful, but escort duty tied the fighters to the bombers' slow speed and made them more vulnerable.
By September, standard tactics for raids had become an amalgam of techniques. A Freie Jagd would precede the main attack formations. The bombers would fly in at altitudes between 16,000 feet (4,900 m) and 20,000 feet (6,100 m), closely escorted by fighters. Escorts were divided into two parts (usually Gruppen), some operating in close contact with the bombers, and others a few hundred yards away and a little above. If the formation was attacked from the starboard, the starboard section engaged the attackers, the top section moving to starboard and the port section to the top position. If the attack came from the port side the system was reversed. British fighters coming from the rear were engaged by the rear section and the two outside sections similarly moving to the rear. If the threat came from above, the top section went into action while the side sections gained height to be able to follow RAF fighters down as they broke away. If attacked, all sections flew in defensive circles. These tactics were skilfully evolved and carried out, and were difficult to counter.
Adolf Galland noted:
We had the impression that, whatever we did, we were bound to be wrong. Fighter protection for bombers created many problems which had to be solved in action. Bomber pilots preferred close screening in which their formation was surrounded by pairs of fighters pursuing a zigzag course. Obviously, the visible presence of the protective fighters gave the bomber pilots a greater sense of security. However, this was a faulty conclusion, because a fighter can only carry out this purely defensive task by taking the initiative in the offensive. He must never wait until attacked because he then loses the chance of acting.
We fighter pilots certainly preferred the free chase during the approach and over the target area. This gives the greatest relief and the best protection for the bomber force.
The biggest disadvantage faced by Bf 109 pilots was that without the benefit of long-range drop tanks (which were introduced in limited numbers in the late stages of the battle), usually of 300 litres (66 imp gal; 79 US gal) capacity, the 109s had an endurance of just over an hour and, for the 109E, a 600 km (370 mi) range. Once over Britain, a 109 pilot had to keep an eye on a red "low fuel" light on the instrument panel: once this was illuminated, he was forced to turn back and head for France. With the prospect of two long flights over water, and knowing their range was substantially reduced when escorting bombers or during combat, the Jagdflieger coined the term Kanalkrankheit or "Channel sickness".
The Luftwaffe was ill-served by its lack of military intelligence about the British defences. The German intelligence services were fractured and plagued by rivalries; their performance was "amateurish". By 1940, there were few German agents operating in Great Britain and a handful of bungled attempts to insert spies into the country were foiled.
As a result of intercepted radio transmissions, the Germans began to realise that the RAF fighters were being controlled from ground facilities; in July and August 1939, for example, the airship Graf Zeppelin, which was packed with equipment for listening in on RAF radio and RDF transmissions, flew around the coasts of Britain. Although the Luftwaffe correctly interpreted these new ground control procedures, they were incorrectly assessed as being rigid and ineffectual. A British radar system was well known to the Luftwaffe from intelligence gathered before the war, but the highly developed "Dowding system" linked with fighter control had been a well-kept secret. Even when good information existed, such as a November 1939 Abwehr assessment of Fighter Command strengths and capabilities by Abteilung V, it was ignored if it did not match conventional preconceptions.
On 16 July 1940, Abteilung V, commanded by Oberstleutnant "Beppo" Schmid, produced a report on the RAF and on Britain's defensive capabilities which was adopted by the frontline commanders as a basis for their operational plans. One of the most conspicuous failures of the report was the lack of information on the RAF's RDF network and control systems capabilities; it was assumed that the system was rigid and inflexible, with the RAF fighters being "tied" to their home bases. An optimistic and, as it turned out, erroneous conclusion reached was:
D. Supply Situation... At present the British aircraft industry produces about 180 to 300 first line fighters and 140 first line bombers a month. In view of the present conditions relating to production (the appearance of raw material difficulties, the disruption or breakdown of production at factories owing to air attacks, the increased vulnerability to air attack owing to the fundamental reorganisation of the aircraft industry now in progress), it is believed that for the time being output will decrease rather than increase.
In the event of an intensification of air warfare it is expected that the present strength of the RAF will fall, and this decline will be aggravated by the continued decrease in production.
Because of this statement, reinforced by another more detailed report, issued on 10 August, there was a mindset in the ranks of the Luftwaffe that the RAF would run out of frontline fighters. The Luftwaffe believed it was weakening Fighter Command at three times the actual attrition rate. Many times, the leadership believed Fighter Command's strength had collapsed, only to discover that the RAF were able to send up defensive formations at will.
Throughout the battle, the Luftwaffe had to use numerous reconnaissance sorties to make up for the poor intelligence. Reconnaissance aircraft (initially mostly Dornier Do 17s, but increasingly Bf 110s) proved easy prey for British fighters, as it was seldom possible for them to be escorted by Bf 109s. Thus, the Luftwaffe operated "blind" for much of the battle, unsure of its enemy's true strengths, capabilities, and deployments. Many of the Fighter Command airfields were never attacked, while raids against supposed fighter airfields fell instead on bomber or coastal defence stations. The results of bombing and air fighting were consistently exaggerated, due to inaccurate claims, over-enthusiastic reports and the difficulty of confirmation over enemy territory. In the euphoric atmosphere of perceived victory, the Luftwaffe leadership became increasingly disconnected from reality. This lack of leadership and solid intelligence meant the Germans did not adopt consistent strategy, even when the RAF had its back to the wall. Moreover, there was never a systematic focus on one type of target (such as airbases, radar stations, or aircraft factories); consequently, the already haphazard effort was further diluted.
While the British were using radar for air defence more effectively than the Germans realised, the Luftwaffe attempted to press its own offensive with advanced radio navigation systems of which the British were initially not aware. One of these was Knickebein ("bent leg"); this system was used at night and for raids where precision was required. It was rarely used during the Battle of Britain (see Reginald Victor Jones and Battle of the Beams).
The Luftwaffe was much better prepared for the task of air-sea rescue than the RAF, specifically tasking the Seenotdienst unit, equipped with about 30 Heinkel He 59 floatplanes, with picking up downed aircrew from the North Sea, English Channel and the Dover Straits. In addition, Luftwaffe aircraft were equipped with life rafts and the aircrew were provided with sachets of a chemical called fluorescein which, on reacting with water, created a large, easy-to-see, bright green patch. In accordance with the Geneva Convention, the He 59s were unarmed and painted white with civilian registration markings and red crosses. Nevertheless, RAF aircraft attacked these aircraft, as some were escorted by Bf 109s.
After single He 59s were forced to land on the sea by RAF fighters, on 1 and 9 July respectively, a controversial order was issued to the RAF on 13 July; this stated that from 20 July, Seenotdienst aircraft were to be shot down. One of the reasons given by Churchill was:
We did not recognise this means of rescuing enemy pilots so they could come and bomb our civil population again ... all German air ambulances were forced down or shot down by our fighters on definite orders approved by the War Cabinet.
unable, however, to grant immunity to such aircraft flying over areas in which operations are in progress on land or at sea, or approaching British or Allied territory, or territory in British occupation, or British or Allied ships. Ambulance aircraft which do not comply with the above will do so at their own risk and peril
The white He 59s were soon repainted in camouflage colours and armed with defensive machine guns. Although another four He 59s were shot down by RAF aircraft, the Seenotdienst continued to pick up downed Luftwaffe and Allied aircrew throughout the battle, earning praise from Adolf Galland for their bravery.
During early tests of the Chain Home system, the slow flow of information from the CH radars and observers to the aircraft often caused them to miss their "bandits". The solution, today known as the "Dowding system", was to create a set of reporting chains to move information from the various observation points to the pilots in their fighters. It was named after its chief architect, "Stuffy" Dowding.
Reports from CH radars and the Observer Corps were sent directly to Fighter Command Headquarters (FCHQ) at Bentley Priory where they were "filtered" to combine multiple reports of the same formations into single tracks. Telephone operators would then forward only the information of interest to the Group headquarters, where the map would be re-created. This process was repeated to produce another version of the map at the Sector level, covering a much smaller area. Looking over their maps, Group level commanders could select squadrons to attack particular targets. From that point the Sector operators would give commands to the fighters to arrange an interception, as well as return them to base. Sector stations also controlled the anti-aircraft batteries in their area; an army officer sat beside each fighter controller and directed the gun crews when to open and cease fire.
The Dowding system dramatically improved the speed and accuracy of the information that flowed to the pilots. During the early war period it was expected that an average interception mission might have a 30% chance of ever seeing their target. During the battle, the Dowding system maintained an average rate over 75%, with several examples of 100% rates - every fighter dispatched found and intercepted its target. In contrast, Luftwaffe fighters attempting to intercept raids had to randomly seek their targets and often returned home having never seen enemy aircraft. The result is what is now known as an example of "force multiplication"; RAF fighters were as effective as two or more Luftwaffe fighters, greatly offsetting, or overturning, the disparity in actual numbers.
Effect of signals intelligence
It is unclear how much the British intercepts of the Enigma cipher, used for high-security German radio communications, affected the battle. Ultra, the information obtained from Enigma intercepts, gave the highest echelons of the British command a view of German intentions. According to F. W. Winterbotham, who was the senior Air Staff representative in the Secret Intelligence Service, Ultra helped establish the strength and composition of the Luftwaffe's formations, the aims of the commanders and provided early warning of some raids. In early August it was decided that a small unit would be set up at FCHQ, which would process the flow of information from Bletchley and provide Dowding only with the most essential Ultra material; thus the Air Ministry did not have to send a continual flow of information to FCHQ, preserving secrecy, and Dowding was not inundated with non-essential information. Keith Park and his controllers were also told about Ultra. In a further attempt to camouflage the existence of Ultra, Dowding created a unit named No. 421 (Reconnaissance) Flight RAF. This unit (which later became No. 91 Squadron RAF), was equipped with Hurricanes and Spitfires and sent out aircraft to search for and report Luftwaffe formations approaching England. In addition the radio listening service (known as Y Service), monitoring the patterns of Luftwaffe radio traffic, contributed considerably to the early warning of raids.
One of the biggest oversights of the entire system was the lack of adequate air-sea rescue organisation. The RAF had started organising a system in 1940 with High Speed Launches (HSLs) based on flying boat bases and at a number of overseas locations, but it was still believed that the amount of cross-Channel traffic meant that there was no need for a rescue service to cover these areas. Downed pilots and aircrew, it was hoped, would be picked up by any boats or ships which happened to be passing by. Otherwise the local life boat would be alerted, assuming someone had seen the pilot going into the water.
RAF aircrew were issued with a life jacket, nicknamed the "Mae West," but in 1940 it still required manual inflation, which was almost impossible for someone who was injured or in shock. The waters of the English Channel and Dover Straits are cold, even in the middle of summer, and clothing issued to RAF aircrew did little to insulate them against these freezing conditions. The RAF also imitated the German practice of issuing fluorescein. A conference in 1939 had placed air-sea rescue under Coastal Command. Because a number of pilots had been lost at sea during the "Channel Battle", on 22 August, control of RAF rescue launches was passed to the local naval authorities and 12 Lysanders were given to Fighter Command to help look for pilots at sea. In all some 200 pilots and aircrew were lost at sea during the battle. No proper air-sea rescue service was formed until 1941.
In the late 1930s, Fighter Command expected to face only bombers over Britain, not single-engined fighters. A series of "Fighting Area Tactics" were formulated and rigidly adhered to, involving a series of manoeuvres designed to concentrate a squadron's firepower to bring down bombers. RAF fighters flew in tight, v-shaped sections ("vics") of three, with four such "sections" in tight formation. Only the squadron leader at the front was free to watch for the enemy; the other pilots had to concentrate on keeping station. Training also emphasised by-the-book attacks by sections breaking away in sequence. Fighter Command recognised the weaknesses of this structure early in the battle, but it was felt too risky to change tactics during the battle, because replacement pilots—often with only minimal flying time—could not be readily retrained, and inexperienced pilots needed firm leadership in the air only rigid formations could provide. German pilots dubbed the RAF formations Idiotenreihen ("rows of idiots") because they left squadrons vulnerable to attack.
Front line RAF pilots were acutely aware of the inherent deficiencies of their own tactics. A compromise was adopted whereby squadron formations used much looser formations with one or two "weavers" flying independently above and behind to provide increased observation and rear protection; these tended to be the least experienced men and were often the first to be shot down without the other pilots even noticing that they were under attack. During the battle, 74 Squadron under Squadron Leader Adolph "Sailor" Malan adopted a variation of the German formation called the "fours in line astern", which was a vast improvement on the old three aircraft "vic". Malan's formation was later generally used by Fighter Command.
Squadron- and higher-level deployment
The weight of the battle fell upon 11 Group. Keith Park's tactics were to dispatch individual squadrons to intercept raids. The intention was to subject incoming bombers to continual attacks by relatively small numbers of fighters and try to break up the tight German formations. Once formations had fallen apart, stragglers could be picked off one by one. Where multiple squadrons reached a raid the procedure was for the slower Hurricanes to tackle the bombers while the more agile Spitfires held up the fighter escort. This ideal was not always achieved, resulting in occasions when Spitfires and Hurricanes reversed roles. Park also issued instructions to his units to engage in frontal attacks against the bombers, which were more vulnerable to such attacks. Again, in the environment of fast moving, three-dimensional air battles, few RAF fighter units were able to attack the bombers from head-on.
During the battle, some commanders, notably Leigh-Mallory, proposed squadrons be formed into "Big Wings," consisting of at least three squadrons, to attack the enemy en masse, a method pioneered by Douglas Bader.
Proponents of this tactic claimed interceptions in large numbers caused greater enemy losses while reducing their own casualties. Opponents pointed out the big wings would take too long to form up, and the strategy ran a greater risk of fighters being caught on the ground refuelling. The big wing idea also caused pilots to overclaim their kills, due to the confusion of a more intense battle zone. This led to the belief big wings were far more effective than they were.
The issue caused intense friction between Park and Leigh-Mallory, as 12 Group was tasked with protecting 11 Group's airfields whilst Park's squadrons intercepted incoming raids. However, the delay in forming up Big Wings meant the formations often did not arrive at all or until after German bombers had hit 11 Group's airfields. Dowding, to highlight the problem of the Big Wing's performance, submitted a report compiled by Park to the Air Ministry on 15 November. In the report, he highlighted that during the period of 11 September – 31 October, the extensive use of the Big Wing had resulted in just 10 interceptions and one German aircraft destroyed, but his report was ignored. Post-war analysis agrees Dowding and Park's approach was best for 11 Group.
Dowding's removal from his post in November 1940 has been blamed on this struggle between Park and Leigh-Mallory's daylight strategy. However, the intensive raids and destruction wrought during the Blitz damaged both Dowding and Park in particular, for the failure to produce an effective night-fighter defence system, something for which the influential Leigh-Mallory had long criticised them.
Bomber and Coastal Command contributions
Bomber Command and Coastal Command aircraft flew offensive sorties against targets in Germany and France during the battle. After the initial disasters of the war, with Vickers Wellington bombers shot down in large numbers attacking Wilhelmshaven and the slaughter of the Fairey Battle squadrons sent to France, it became clear that Bomber Command would have to operate mainly at night to achieve any results without incurring very high losses. Night raids began with the bombing of München-Gladbach on the night of 11 May 1940, and from 15 May a night time bomber campaign was launched against the German oil industry, communications, and forests/crops, mainly in the Ruhr area.
As the threat mounted, Bomber Command changed targeting priority on 3 June 1940 to attack the German aircraft industry. On 4 July, the Air Ministry gave Bomber Command orders to attack ports and shipping. By September, the build-up of invasion barges in the Channel ports had become a top priority target. On 7 September, the government issued a warning that the invasion could be expected within the next few days and, that night, Bomber Command attacked the Channel ports and supply dumps. On 13 September, they carried out another large raid on the Channel ports, sinking 80 large barges in the port of Ostend. 84 barges were sunk in Dunkirk after another raid on 17 September and by 19 September, almost 200 barges had been sunk. The loss of these barges may have contributed to Hitler's decision to postpone Operation Sea Lion indefinitely. The success of these raids was in part because the Germans had few Freya radar stations set up in France, so that air defences of the French harbours were not nearly as good as the air defences over Germany; Bomber Command had directed some 60% of its strength against the Channel ports.
The Bristol Blenheim units also raided German-occupied airfields throughout July to December 1940, both during daylight hours and at night. Although most of these raids were unproductive, there were some successes; on 1 August, five out of 12 Blenheims sent to attack Haamstede and Evere (Brussels) were able to bomb, destroying or heavily damaging three Bf 109s of II./JG 27 and apparently killing a Staffelkapitän identified as a Hauptmann Albrecht von Ankum-Frank. Two other 109s were claimed by Blenheim gunners.[nb 18] Another successful raid on Haamstede was made by a single Blenheim on 7 August which destroyed one 109 of 4./JG 54, heavily damaged another and caused lighter damage to four more.
There were some missions which produced an almost 100% casualty rate amongst the Blenheims; one such operation was mounted on 13 August 1940 against a Luftwaffe airfield near Aalborg in north-eastern Denmark by 12 aircraft of 82 Squadron. One Blenheim returned early (the pilot was later charged and due to appear before a court martial, but was killed on another operation), the other 11, which reached Denmark, were shot down, five by flak and six by Bf 109s. Of the 33 crewmen who took part in the attack, 20 were killed and 13 captured.
As well as the bombing operations, Blenheim-equipped units had been formed to carry out long-range strategic reconnaissance missions over Germany and German-occupied territories. In this role, the Blenheims again proved to be too slow and vulnerable against Luftwaffe fighters, and they took constant casualties.
Coastal Command directed its attention towards the protection of British shipping, and the destruction of enemy shipping. As invasion became more likely, it participated in the strikes on French harbours and airfields, laying mines, and mounting numerous reconnaissance missions over the enemy-held coast. In all, some 9,180 sorties were flown by bombers from July to October 1940. Although this was much less than the 80,000 sorties flown by fighters, bomber crews suffered about half the total number of casualties borne by their fighter colleagues. The bomber contribution was, therefore, much more dangerous on a loss-per-sortie comparison.
Bomber, reconnaissance, and antisubmarine patrol operations continued throughout these months with little respite and none of the publicity accorded to Fighter Command. In his famous 20 August speech about "The Few", praising Fighter Command, Churchill also made a point of mentioning Bomber Command's contribution, adding that bombers were even then striking back at Germany; this part of the speech is often overlooked, even today. The Battle of Britain Chapel in Westminster Abbey lists in a roll of honour, 718 Bomber Command crew members, and 280 from Coastal Command who were killed between 10 July and 31 October.
Phases of the battle
The battle can be roughly divided into four phases:
- 10 July – 11 August: Kanalkampf ("the Channel battles")
- 12–23 August: Adlerangriff ("Eagle Attack"), the early assault against the coastal airfields
- 24 August – 6 September: the Luftwaffe targets the airfields. The critical phase of the battle.
- 7 September onwards: the day attacks switch to British towns and cities.
The Kanalkampf comprised a series of running fights over convoys in the English Channel. It was launched partly because Kesselring and Sperrle were not sure about what else to do, and partly because it gave German aircrews some training and a chance to probe the British defences. Dowding could only provide minimal shipping protection, and these battles off the coast tended to favour the Germans, whose bomber escorts had the advantage of altitude and outnumbered the RAF fighters. From 9 July reconnaissance probing by Dornier Do 17 bombers put a severe strain on RAF pilots and machines, with high RAF losses to Bf 109s. When nine 141 Squadron Defiants went into action on 19 July six were lost to Bf 109s before a squadron of Hurricanes intervened. On 25 July a coal convoy and escorting destroyers suffered such heavy losses to attacks by Stuka dive bombers that the Admiralty decided convoys should travel at night: the RAF shot down 16 raiders but lost 7 aircraft. By 8 August 18 coal ships and 4 destroyers had been sunk, but the Navy was determined to send a convoy of 20 ships through rather than move the coal by railway. After repeated Stuka attacks that day, six ships were badly damaged, four were sunk and only four reached their destination. The RAF lost 19 fighters and shot down 31 German aircraft. The Navy now cancelled all further convoys through the Channel and sent the cargo by rail. Even so, these early combat encounters provided both sides with experience.
The main attack upon the RAF's defences was code-named Adlerangriff ("Eagle Attack").
Poor weather delayed Adlertag ("Eagle Day") until 13 August 1940. On 12 August, the first attempt was made to blind the Dowding system, when aircraft from the specialist fighter-bomber unit Erprobungsgruppe 210 attacked four radar stations. Three were briefly taken off the air but were back working within six hours. The raids appeared to show that British radars were difficult to knock out. The failure to mount follow-up attacks allowed the RAF to get the stations back on the air, and the Luftwaffe neglected strikes on the supporting infrastructure, such as phone lines and power stations, which could have rendered the radars useless, even if the towers themselves (which were very difficult to destroy) remained intact.
Adlertag opened with a series of attacks, led again by Epro 210, on coastal airfields used as forward landing grounds for the RAF fighters, as well as 'satellite airfields'[nb 19] (including Manston and Hawkinge). As the week drew on, the airfield attacks moved further inland, and repeated raids were made on the radar chain. 15 August was "The Greatest Day" when the Luftwaffe mounted the largest number of sorties of the campaign. Luftflotte 5 attacked the north of England. Believing Fighter Command strength to be concentrated in the south, raiding forces from Denmark and Norway ran into unexpectedly strong resistance. Inadequately escorted by Bf 110s, bombers were shot down in large numbers. North East England was attacked by 65 Heinkel 111s escorted by 34 Messerschmitt 110s, and RAF Great Driffield was attacked by 50 unescorted Junkers 88s. Out of 115 bombers and 35 fighters sent, 16 bombers and 7 fighters were destroyed. As a result of these casualties, Luftflotte 5 did not appear in strength again in the campaign.
18 August, which had the greatest number of casualties to both sides, has been dubbed "The Hardest Day". Following this grinding battle, exhaustion and the weather reduced operations for most of a week, allowing the Luftwaffe to review their performance. "The Hardest Day" had sounded the end for the Ju 87 in the campaign. This veteran of Blitzkrieg was too vulnerable to fighters to operate over Britain. So as to preserve the Stuka force, Göring withdrew them from the fighting. This removed the main Luftwaffe precision-bombing weapon and shifted the burden of pinpoint attacks on the already-stretched Erpro 210. The Bf 110 proved too clumsy for dogfighting with single-engined fighters, and its participation was scaled back. It would only be used when range required it or when sufficient single-engined escort could not be provided for the bombers.
Göring made yet another fateful decision: to order more bomber escorts at the expense of free-hunting sweeps. To achieve this, the weight of the attack now fell on Luftflotte 2, and the bulk of the Bf 109s in Luftflotte 3 were transferred to Kesselring's command, reinforcing the fighter bases in the Pas-de-Calais. Stripped of its fighters, Luftflotte 3 would concentrate on the night bombing campaign. Göring, expressing disappointment with the fighter performance thus far in the campaign, also made sweeping changes in the command structure of the fighter units, replacing many Geschwaderkommodore with younger, more aggressive pilots like Adolf Galland and Werner Mölders.
Finally, Göring stopped the attacks on the radar chain. These were seen as unsuccessful, and neither the Reichsmarschall nor his subordinates realised how vital the Chain Home stations were to the defence systems. It was known that radar provided some early warning of raids, but the belief among German fighter pilots was that anything bringing up the "Tommies" to fight was to be encouraged.
Luftwaffe targets RAF airfields
Göring ordered attacks on aircraft factories on 19 August 1940; on 23 August 1940 he ordered that RAF airfields be attacked. That evening an attack was mounted on a tyre factory in Birmingham. Raids on airfields continued through 24 August, and Portsmouth was hit by a major attack. That night, several areas of London were bombed; the East End was set ablaze and bombs landed on central London. Some historians believe that these bombs were dropped accidentally by a group of Heinkel He 111s which had failed to find their target; this account has been contested. In retaliation, the RAF bombed Berlin on the night of 25–26 August, and continued bombing raids on Berlin. Göring's pride was hurt, as he had previously claimed the British would never be able to bomb the city. The attacks enraged Hitler, who ordered retaliatory attacks on London.
From 24 August onwards, the battle was a fight between Kesselring's Luftflotte 2 and Park's 11 Group. The Luftwaffe concentrated all their strength on knocking out Fighter Command and made repeated attacks on the airfields. Of the 33 heavy attacks in the following two weeks, 24 were against airfields. The key sector stations were hit repeatedly: Biggin Hill and Hornchurch four times each; Debden and North Weald twice each. Croydon, Gravesend, Rochford, Hawkinge and Manston were also attacked in strength. Coastal Command's Eastchurch was bombed at least seven times because it was believed to be a Fighter Command aerodrome. At times these raids caused some damage to the sector stations, threatening the integrity of the Dowding system.
To offset some losses, some 58 Fleet Air Arm fighter pilot volunteers were seconded to RAF squadrons, and a similar number of former Fairey Battle pilots were used. Most replacements from Operational Training Units (OTUs) had as little as nine hours flying time and no gunnery or air-to-air combat training. At this point, the multinational nature of Fighter Command came to the fore. Many squadrons and personnel from the air forces of the Dominions were already attached to the RAF, including top level commanders – Australians, Canadians, New Zealanders, Rhodesians and South Africans. In addition, there were other nationalities represented, including Free French, Belgian and a Jewish pilot from the British mandate of Palestine.
They were bolstered by the arrival of fresh Czechoslovak and Polish squadrons. These had been held back by Dowding, who mistakenly thought non-English speaking aircrew would have trouble working within his control system: Polish and Czech fliers proved to be especially effective. The pre-war Polish Air Force had lengthy and extensive training, and high standards; with Poland conquered and under brutal German occupation, the pilots of No. 303 (Polish) Squadron, the highest-scoring Allied unit, were strongly motivated. Josef František, a Czech regular airman who had flown from the occupation of his own country to join the Polish and then French air forces before arriving in Britain, flew as a guest of 303 Squadron and was ultimately credited with the highest "RAF score" in the Battle of Britain.
The RAF had the advantage of fighting over home territory. Pilots who bailed out of their downed aircraft could be back at their airfields within hours, while if low on fuel and/or ammunition they could be immediately rearmed. One RAF pilot interviewed in late 1940 had been shot down five times during the Battle of Britain, but was able to crash land in Britain or bail out each time. For Luftwaffe aircrews, a bailout over England meant capture – in the critical August period, almost exactly as many Luftwaffe pilots were taken prisoner as were killed – while parachuting into the English Channel often meant drowning or death from exposure. Morale began to suffer, and [Kanalkrankheit] ("Channel sickness") – a form of combat fatigue – began to appear among the German pilots. Their replacement problem became even worse than the British.
Impact of offensive
The effect of the German attacks on airfields is unclear. According to Stephen Bungay, Dowding, in a letter to Hugh Trenchard accompanying Park's report on the period 8 August – 10 September 1940, states that the Luftwaffe "achieved very little" in the last week of August and the first week of September. The only Sector Station to be shut down operationally was Biggin Hill, and it was non-operational for just two hours. Dowding admitted 11 Group's efficiency was impaired but, despite serious damage to some airfields, only two out of 13 heavily attacked airfields were down for more than a few hours. The German refocus on London was not critical.
Retired air marshal Peter Dye, head of the RAF Museum, discussed the logistics of the battle in 2000 and 2010, dealing specifically with the single-seat fighters. Dye contends that not only was British aircraft production replacing aircraft, but replacement pilots were keeping pace with losses. The number of pilots in RAF Fighter Command increased during July, August and September. The figures indicate the number of pilots available never decreased. From July, 1,200 were available. On 1 August, 1,400 were available. Just over that number were in the field by September. In October the figure was nearly 1,600. By 1 November 1,800 were available. Throughout the battle, the RAF had more fighter pilots available than the Luftwaffe. Although the RAF's reserves of single seat fighters fell during July, the wastage was made up for by an efficient Civilian Repair Organisation (CRO), which by December had repaired and put back into service some 4,955 aircraft, and by aircraft held at Air Servicing Unit (ASU) airfields.
Richard Overy agrees with Dye and Bungay. Overy asserts only one airfield was temporarily put out of action and "only" 103 pilots were lost. British fighter production produced 496 new aircraft in July and 467 in August, and another 467 in September (not counting repaired aircraft), covering the losses of August and September. Overy indicates the number of serviceable and total strength returns reveal an increase in fighters from 3 August to 7 September, 1,061 on strength and 708 serviceable to 1,161 on strength and 746 serviceable. Moreover, Overy points out that the number of RAF fighter pilots grew by one-third between June and August 1940. Personnel records show a constant supply of around 1,400 pilots in the crucial weeks of the battle. In the second half of September it reached 1,500. The shortfall of pilots was never above 10%. The Germans never had more than between 1,100 and 1,200 pilots, a deficiency of up to one-third. "If Fighter Command were 'the few', the German fighter pilots were fewer".
Other scholars assert that this period was the most dangerous of all. In The Narrow Margin, published in 1961, historians Derek Wood and Derek Dempster believed that the two weeks from 24 August to 6 September represented a real danger. According to them, from 24 August to 6 September 295 fighters had been totally destroyed and 171 badly damaged, against a total output of 269 new and repaired Spitfires and Hurricanes. They assert that 103 pilots were killed or missing and 128 were wounded, which represented a total wastage of 120 pilots per week out of a fighting strength of just fewer than 1,000. They conclude that during August no more than 260 fighter pilots were turned out by OTUs and casualties in the same month were just over 300. A full squadron establishment was 26 pilots whereas the average in August was 16. In their assessment, the RAF was losing the battle. Denis Richards, in his 1953 contribution to the official British account History of the Second World War, agreed that lack of pilots, especially experienced ones, was the RAF's greatest problem. He states that between 8 and 18 August 154 RAF pilots were killed, severely wounded, or missing, while only 63 new pilots were trained. Availability of aircraft was also a serious issue. While its reserves during the Battle of Britain never declined to a half dozen planes as some later claimed, Richards describes 24 August to 6 September as the critical period because during these two weeks Germany destroyed far more aircraft through its attacks on 11 Group's southeast bases than Britain was producing. Three more weeks of such a pace would indeed have exhausted aircraft reserves. Germany had seen heavy losses of pilots and aircraft as well however, thus its shift to night-time attacks in September. On 7 September RAF aircraft losses fell below British production and remained so until the end of the war.
Raids on British cities
Hitler's No. 17 Directive on the conduct of war against the United Kingdom, issued on 1 August 1940, specifically prohibited the Luftwaffe from conducting terror raids on its own initiative, and reserved the right of ordering terror attacks as means of reprisal for the Führer himself:
The war against England is to be restricted to destructive attacks against industry and air force targets which have weak defensive forces ... The most thorough study of the target concerned, that is vital points of the target, is a pre-requisite for success. It is also stressed that every effort should be made to avoid unnecessary loss of life amongst the civilian population.
The Luftwaffe offensive against Britain had included numerous raids on major ports since August, but Hitler had issued a directive that London was not to be bombed save on his sole instruction. However, on the afternoon of 15 August, Hauptmann Walter Rubensdörffer leading Erprobungsgruppe 210 mistakenly bombed the Croydon airfield (on the outskirts of London) instead of the intended target, RAF Kenley; this was followed on the night of 23/24 August by the accidental bombing of Harrow, also on the outskirts of London, as well as raids on Aberdeen, Bristol, and South Wales. The focus on attacking airfields had also been accompanied by a sustained bombing campaign which began on 24 August with the largest raid so far, killing 100 in Portsmouth, and that evening the first night raid on London as described above. On 25 August 1940, 81 bombers of Bomber Command were sent out to raid industrial and commercial targets in Berlin. Clouds prevented accurate identification and the bombs fell across the city, causing some casualties among the civilian population as well as damage to residential areas. Continuing RAF raids on Berlin in retaliation led to Hitler withdrawing his directive, and on 3 September Göring planned to bomb London daily, with General Albert Kesselring's enthusiastic support, having received reports the average strength of RAF squadrons was down to five or seven fighters out of twelve and their airfields in the area were out of action. Hitler issued a directive on 5 September to attack cities including London. In his speech delivered on 4 September 1940, Hitler threatened to obliterate (ausradieren) British cities if British bombing runs against Germany did not stop.
On 7 September, a massive series of raids involving nearly four hundred bombers and more than six hundred fighters targeted docks in the East End of London, day and night. The raids were code named Operation Loge. The RAF anticipated attacks on airfields and 11 Group rose to meet them, in greater numbers than the Luftwaffe expected. The first official deployment of 12 Group's Leigh-Mallory's Big Wing took twenty minutes to form up, missing its intended target, but encountering another formation of bombers while still climbing. They returned, apologetic about their limited success, and blamed the delay on being scrambled too late. Fighter Command had been at its lowest ebb, short of men and machines, and the break from airfield attacks allowed them to recover. 11 Group had considerable success in breaking up daytime raids. 12 Group repeatedly disobeyed orders and failed to meet requests to protect 11 Group airfields, but their experiments with increasingly large Big Wings had some success. The Luftwaffe began to abandon their morning raids, with attacks on London starting late in the afternoon for fifty-seven consecutive nights.
The most damaging aspect to the Luftwaffe of targeting London was the increase in range. The Bf 109E escorts had a limited fuel capacity resulting in only a 660 km (410 mile) maximum range solely on internal fuel, and when they arrived had only 10 minutes of flying time before turning for home, leaving the bombers undefended by fighter escorts. Its eventual stablemate, the Focke-Wulf Fw 190A, was only flying in prototype form in the summer of 1940; the first 28 Fw 190s were not delivered until November 1940. The Fw 190A-1 had a maximum range of 940 km (584 miles) on internal fuel, 40% greater than the Bf 109E. The Messerschmitt Bf 109E-7 corrected this deficiency by adding a ventral center-line ordnance rack to take either an SC 250 bomb or a standard 300 litre Luftwaffe drop tank to double the range to 1,325 km (820 mi). The ordnance rack was not retrofitted to earlier Bf 109Es until October 1940.
On 14 September, Hitler chaired a meeting with the OKW staff. Göring was in France directing the decisive battle, so Erhard Milch deputized for him. Hitler asked "Should we call it off altogether?". General Hans Jeschonnek, Luftwaffe Chief of Staff, begged for a last chance to defeat the RAF and for permission to launch attacks on civilian residential areas to cause mass panic. Hitler refused the latter, perhaps unaware of how much damage had already been done to civilian targets. He reserved for himself the power to unleash the terror weapon. Instead political will was to be broken by destroying the material infrastructure, the weapons industry, and stocks of fuel and food.
On 15 September, two massive waves of German attacks were decisively repulsed by the RAF by deploying every aircraft in 11 Group. Sixty German and 26 RAF aircraft were shot down. Two days after the German defeat Hitler postponed preparations for the invasion of Britain. Henceforth, in the face of mounting losses in men, aircraft and the lack of adequate replacements, the Luftwaffe switched from daylight to nighttime bombing. 15 September is commemorated as Battle of Britain Day.
On 16 September, Göring ordered the air fleets to begin the new phase of the battle. Hitler hoped this might result in "eight million going mad" (referring to the population of London in 1940), which would "cause a catastrophe" for the British. In those circumstances, Hitler said, "even a small invasion might go a long way". Hitler was against cancelling the invasion as "the cancellation would reach the ears of the enemy and strengthen his resolve".[nb 20][nb 21]
A Junkers Ju 88 returning from a raid on London was shot down in Kent on 27 September resulting in the Battle of Graveney Marsh, the last action between British and foreign military forces on British mainland soil.
Hitler postponed the invasion on 13 October "until the spring of 1941", and October is regarded as the month regular bombing of Britain ended. It was not until Hitler's Directive 21 was issued, on 18 December 1940, that the threat of invasion finally ended.
During the battle, and for the rest of the war, an important factor in keeping public morale high was the continued presence in London of King George VI and his wife Queen Elizabeth. When war broke out in 1939, the King and Queen decided to stay in London and not flee to Canada, as had been suggested.[nb 22] George VI and Elizabeth officially stayed in Buckingham Palace throughout the war, although they often spent weekends at Windsor Castle to visit their daughters, Elizabeth (the future queen) and Margaret. Buckingham Palace was damaged by bombs which landed in the grounds on 10 September and, on 13 September, more serious damage was caused by two bombs which destroyed the Royal Chapel. The royal couple were in a small sitting room about 80 yards from where the bombs exploded. On 24 September, in recognition of the bravery of civilians, King George VI inaugurated the award of the George Cross.
Overall, by 2 November, the RAF fielded 1,796 pilots, an increase of over 40% from July 1940's count of 1,259 pilots. Based on German sources (from a Luftwaffe intelligence officer Otto Bechtle attached to KG 2 in February 1944) translated by the Air Historical Branch, Stephen Bungay asserts German fighter and bomber "strength" declined without recovery, and that from August – December 1940, the German fighter and bomber strength declined by 30 and 25 percent. In contrast, Williamson Murray, argues (using translations by the Air Historical Branch) that 1,380 German bombers were on strength on 29 June 1940, 1,420 bombers on 28 September, 1,423 level bombers on 2 November and 1,393 bombers on 30 November 1940. In July – September the number of Luftwaffe pilots available fell by 136, but the number of operational pilots had shrunk by 171 by September. The training organisation of the Luftwaffe was failing to replace losses. German fighter pilots, in contrast to popular perception, were not afforded training or rest rotations unlike their British counterparts. The first week of September accounted for 25% of the Fighter Command, and 24% of the Luftwaffe's overall losses. Between the dates 26 August – 6 September, on only one day (1 September) did the Germans destroy more aircraft than they lost. Losses were 325 German and 248 British.
Luftwaffe losses for August numbered 774 aircraft to all causes, representing 18.5% of all combat aircraft at the beginning of the month. Fighter Command's losses in August were 426 fighters destroyed, amounting to 40 per cent of 1,061 fighters available on 3 August. In addition, 99 German bombers and 27 other types were destroyed between 1 and 29 August.
From July to September, the Luftwaffe's loss records indicate the loss of 1,636 aircraft, 1,184 to enemy action. This represented 47% of the initial strength of single-engined fighters, 66% of twin-engined fighters, and 45% of bombers. This indicates the Germans were running out of aircrews as well as aircraft.
Throughout the battle, the Germans greatly underestimated the size of the RAF and the scale of British aircraft production. Across the Channel, the Air Intelligence division of the Air Ministry consistently overestimated the size of the German air enemy and the productive capacity of the German aviation industry. As the battle was fought, both sides exaggerated the losses inflicted on the other by an equally large margin. However, the intelligence picture formed before the battle encouraged the Luftwaffe to believe that such losses pushed Fighter Command to the very edge of defeat, while the exaggerated picture of German air strength persuaded the RAF that the threat it faced was larger and more dangerous than was the case. This led the British to the conclusion that another fortnight of attacks on airfields might force Fighter Command to withdraw their squadrons from the south of England. The German misconception, on the other hand, encouraged first complacency, then strategic misjudgement. The shift of targets from air bases to industry and communications was taken because it was assumed that Fighter Command was virtually eliminated.
Between the 24 August and 4 September, German serviceability rates, which were acceptable at Stuka units, were running at 75% with Bf 109s, 70% with bombers and 65% with Bf 110s, indicating a shortage of spare parts. All units were well below established strength. The attrition was beginning to affect the fighters in particular." By 14 September, the Luftwaffe's Bf 109 Geschwader possessed only 67% of their operational crews against authorised aircraft. For Bf 110 units it was 46 per cent; and for bombers it was 59 per cent. A week later the figures had dropped to 64 per cent, 52% and 52 per cent. Serviceability rates in Fighter Command's fighter squadrons, between the 24 August and 7 September, were listed as: 64.8% on 24 August; 64.7% on 31 August and 64.25% on 7 September 1940.
Due to the failure of the Luftwaffe to establish air supremacy, a conference assembled on 14 September at Hitler's headquarters. Hitler concluded that air superiority had not yet been established and "promised to review the situation on 17 September for possible landings on 27 September or 8 October. Three days later, when the evidence was clear that the German Air Force had greatly exaggerated the extent of their successes against the RAF, Hitler postponed Sea Lion indefinitely."
The Battle of Britain marked the first major defeat of Hitler's military forces, with air superiority seen as the key to victory. Pre-war theories had led to exaggerated fears of strategic bombing, and UK public opinion was buoyed by coming through the ordeal. For the RAF, Fighter Command had achieved a great victory in successfully carrying out Sir Thomas Inskip's 1937 air policy of preventing the Germans from knocking Britain out of the war. Churchill concluded his famous 18 June 'Battle of Britain' speech in the House of Commons by referring to pilots and aircrew who fought the Battle: "... if the British Empire and its Commonwealth lasts for a thousand years, men will still say, 'This was their finest hour.'"[nb 23]
The battle also significantly shifted American opinion. During the battle, many Americans accepted the view promoted by Joseph Kennedy, the American ambassador in London, who believed that the United Kingdom could not survive. Roosevelt wanted a second opinion, and sent "Wild Bill" Donovan on a brief visit to the UK; he became convinced the UK would survive and should be supported in every possible way. Before the end of the year American journalist Ralph Ingersoll, after returning from Britain, published a book concluding that "Adolf Hitler met his first defeat in eight years" in what might "go down in history as a battle as important as Waterloo or Gettysburg". The turning point was when the Germans reduced the intensity of the Blitz after 15 September. According to Ingersoll, "[a] majority of responsible British officers who fought through this battle believe that if Hitler and Göring had had the courage and the resources to lose 200 planes a day for the next five days, nothing could have saved London"; instead, "[the Luftwaffe's] morale in combat is definitely broken, and the RAF has been gaining in strength each week."
Both sides in the battle made exaggerated claims of numbers of enemy aircraft shot down. In general, claims were two to three times the actual numbers, because of the confusion of fighting in dynamic three-dimensional air battles. Postwar analysis of records has shown that between July and September, the RAF claimed 2,698 kills, while the Luftwaffe fighters claimed 3,198 RAF aircraft downed. Total losses, and start and end dates for recorded losses, vary for both sides. Luftwaffe losses from 10 July to 30 October 1940 total 1,652 aircraft, including 229 twin- and 533 single-engined fighters. In the same period, RAF Fighter Command aircraft losses number 1,087, including 53 twin-engined fighters. To the RAF figure should be added 376 Bomber Command and 148 Coastal Command aircraft conducting bombing, mining, and reconnaissance operations in defence of the country.
There is a consensus among historians that the Luftwaffe were unable to crush the RAF. Stephen Bungay described Dowding and Park's strategy of choosing when to engage the enemy whilst maintaining a coherent force as vindicated; their leadership, and the subsequent debates about strategy and tactics, however, had created enmity among RAF senior commanders and both were sacked from their posts in the immediate aftermath of the battle. All things considered, the RAF proved to be a robust and capable organisation which was to use all the modern resources available to it to the maximum advantage. Richard Evans wrote:
Irrespective of whether Hitler was really set on this course, he simply lacked the resources to establish the air superiority that was the sine qua non-of a successful crossing of the English Channel. A third of the initial strength of the German air force, the Luftwaffe, had been lost in the western campaign in the spring. The Germans lacked the trained pilots, the effective fighter aircraft, and the heavy bombers that would have been needed.[nb 24]
The Germans launched some spectacular attacks against important British industries, but they could not destroy the British industrial potential, and made little systematic effort to do so. Hindsight does not disguise the fact the threat to Fighter Command was very real, and for the participants it seemed as if there was a narrow margin between victory and defeat. Nevertheless, even if the German attacks on the 11 Group airfields which guarded southeast England and the approaches to London had continued, the RAF could have withdrawn to the Midlands out of German fighter range and continued the battle from there. The victory was as much psychological as physical. Writes Alfred Price:
The truth of the matter, borne out by the events of 18 August is more prosaic: neither by attacking the airfields, nor by attacking London, was the Luftwaffe likely to destroy Fighter Command. Given the size of the British fighter force and the general high quality of its equipment, training and morale, the Luftwaffe could have achieved no more than a Pyrrhic victory. During the action on 18 August it had cost the Luftwaffe five trained aircrew killed, wounded or taken prisoner, for each British fighter pilot killed or wounded; the ratio was similar on other days in the battle. And this ratio of 5:1 was very close to that between the number of German aircrew involved in the battle and those in Fighter Command. In other words the two sides were suffering almost the same losses in trained aircrew, in proportion to their overall strengths. In the Battle of Britain, for the first time during the Second World War, the German war machine had set itself a major task which it patently failed to achieve, and so demonstrated that it was not invincible. In stiffening the resolve of those determined to resist Hitler the battle was an important turning point in the conflict.
The British victory in the Battle of Britain was achieved at a heavy cost. Total British civilian losses from July to December 1940 were 23,002 dead and 32,138 wounded, with one of the largest single raids on 19 December 1940, in which almost 3,000 civilians died. With the culmination of the concentrated daylight raids, Britain was able to rebuild its military forces and establish itself as an Allied stronghold, later serving as a base from which the Liberation of Western Europe was launched.
Battle of Britain Day
Winston Churchill summed up the effect of the battle and the contribution of RAF Fighter Command, RAF Bomber Command, RAF Coastal Command and the Fleet Air Arm with the words, "Never in the field of human conflict was so much owed by so many to so few". Pilots who fought in the battle have been known as The Few ever since; at times being specially commemorated on 15 September, "Battle of Britain Day". On this day in 1940, the Luftwaffe embarked on their largest bombing attack yet, forcing the engagement of the entirety of the RAF in defence of London and the South East, which resulted in a decisive British victory that proved to mark a turning point in Britain's favour.
The day has been observed by many artists over the years, often with works that show the battle itself. Many Mixed Media artists have also created pieces in honor of the Battle of Britain.
Memorials and museums
There are numerous memorials to the battle. The most important ones are the Battle of Britain Monument in London and the Battle of Britain Memorial at Capel-le-Ferne in Kent. Westminster Abbey and St James's Church in Paddington both have memorial windows to the battle, replacing windows that were destroyed during it. There is also a memorial at the former Croydon Airport, one of the RAF bases during the battle, and a memorial to the pilots at Armadale Castle on the Isle of Skye in Scotland, which is topped by a raven sculpture.
In 2015 the RAF created an online 'Battle of Britain 75th Anniversary Commemorative Mosaic' composed of pictures of “the few” - the pilots and aircrew who fought in the battle - and “the many” - 'the often unsung others whose contribution during the Battle of Britain was also vital to the RAF’s victory in the skies above Britain', submitted by participants and their families.
The story of the battle was documented in, amongst many others, the 1969 film Battle of Britain, which drew many respected British actors to act key figures of the battle, including Sir Laurence Olivier as Hugh Dowding and Trevor Howard as Keith Park. It also starred Michael Caine, Christopher Plummer and Robert Shaw as Squadron Leaders. Former participants of the battle served as technical advisors including Douglas Bader, James Lacey, Robert Stanford Tuck, Adolf Galland and Dowding himself. An Italian film around the same time titled Eagles Over London (1969) also featured the Battle of Britain.
It was also the subject of the 1941 Allied propaganda film Churchill's Island, winner of the first-ever Academy Award for Documentary Short Subject. There was also the 1943 The Battle of Britain in Frank Capra's Why We Fight series. In 2010, actor Julian Glover played a 101-year-old Polish veteran RAF pilot in the short film Battle for Britain.
- Air warfare of World War II
- Battle information
- Battle in contemporary history
- Post-war memorials
- Stacey, p.256: "Even as Britain braced itself to meet the attack of the Luftwaffe, the nice legalities of Commonwealth cooperation had to be observed. But the R.C.A.F., like the Canadian Army, was determined that there should be no possibility of these formalities conferring any advantage on the enemy. To avoid misunderstanding, delay and perhaps embarrassment, and doubtless to emphasize the point that No. 1 Squadron was, after all, a Canadian unit, Air Commodore Walsh early brought the necessity of conforming to the Visiting Forces Acts to the attention of the Air Officer Commanding No. 11 Group R.A.F., under whom the squadron would fight..."
- The Polish, Czech and most other national contingents were, at this time, incorporated into the RAF itself: the Polish Air Force, for example, was not given sovereignty until June 1944. Although under RAF operational control, RCAF pilots in the BoB were technically flying for the RCAF
- The British date the battle from 10 July to 31 October 1940, which represented the most intense period of daylight bombing. German historians usually place the beginning of the battle in May 1940 and end it mid-August 1941, with the withdrawal of the bomber units in preparation for Operation Barbarossa, the campaign against the Soviet Union, which began on 22 June 1941.
- For example: Terraine states that the outcome was "decisive"; quoting Luftwaffe General Werner Kreipe, who described it as a "strategic (Luftwaffe) failure" and "turning point in the Second World War". It also states the "German Air Force was bled almost to death, and suffered losses that could never be made good throughout the course of the war". Quoting Dr (Karl) Klee "The invasion and subjugation of Britain was made to depend on that battle, and its outcome therefore materially influenced the further course and fate of the war as a whole".
Other references that can be consulted include:
- Shulman 2004, p. 63.
- Bungay 2000, p. 368.
- Hough and Richards 2007, p. XV.
- Overy 2001, p. 267.
- Deighton 1980, p. 213.
- Keegan 1997, p. 81.
- Buell 2002, p. 83.
- Terraine 1985, p. 181.
- 754 single-seat fighters, 149 two-seat fighters, 560 bombers and 500 coastal aircraft. The RAF fighter strength given is for 0900 1 July 1940, while bomber strength is for 11 July 1940.
- Figures taken from Quartermaster General 6th Battalion returns on 10 August 1940. According to these, the Luftwaffe deployed 3,358 aircraft against Britain, of which 2,550 were serviceable. The force was made up by 934 single-seat fighters, 289 two-seat fighters, 1,482 medium bombers, 327 dive-bombers, 195 reconnaissance and 93 coastal aircraft, including unserviceable aircraft. The number of serviceable aircraft amounted to 805 single-seat fighters, 224 two-seat fighters, 998 medium bombers, 261 dive-bombers, 151 reconnaissance and 80 coastal aircraft.
- The Luftwaffe possessed 4,074 aircraft, but not all of these were deployed against Britain. The force was made up of 1,107 single-seat fighters, 357 two-seat fighters, 1,380 medium bombers, 428 dive-bombers, 569 reconnaissance and 233 coastal aircraft, including unserviceable aircraft. The Luftwaffe air strength given is from the Quartermaster General 6th Battalion numbers for 29 June 1940.
- 1,023 fighters, 376 bombers and 148 aircraft from Coastal Command.
- 873 fighters and 1,014 bombers destroyed.
- The strategic bombing commenced after the Germans bombed London on 14 September 1940, followed by the RAF bombing of Berlin and German air force bases in France. Adolf Hitler withdrew his directive not to bomb population centres and ordered attacks on British cities.
- The Royal Navy had deployed 39 destroyers during the Dunkirk evacuation, losing six, with a further 19 damaged and put out of service; even so, by early July, 40 destroyers were disposed between the Humber and Portsmouth.
- The entire text of Directive 16 is translated in Kieser 1999 as Appendix, on pp. 274–277. Directive No. 17; On the conduct of the Air and Sea War against England is translated on pp. 277–278. Another document, Appeal To the Population of England, is translated on p. 278.
- Bf 109E-3 and E-4s had this armament, while the E-1, which was still used in large numbers, was armed with four 7.92mm machine guns.
- The inboard position of the upper wing roundels on the Spitfire strongly suggests this was a repainted captured Spitfire or a photo-reconnaissance model, at least one of which was captured in France.
- The pilots occupying these administrative positions included such officers as Dowding, Park and Leigh-Mallory and the numbers actually fit to serve in front line fighter squadrons are open to question.
- This was the turning radius of a Bf 109, meaning that both aircraft, if necessary, could turn together at high speed.
- This formation was developed based on principles formulated by the First World War ace Oswald Boelcke in 1916. In 1934 the Finnish Air Force adopted similar formations, called partio (patrol; two aircraft) and parvi (two patrols; four aircraft), for similar reasons, though Luftwaffe' pilots during the Spanish Civil War (led by Günther Lützow and Werner Mölders among others,) are generally given credit.
- This account is from Warner 2005, p. 253 Another source, Ramsay 1989, p. 555, lists no aircrew casualties and three 109s in total destroyed or damaged.
- "Satellite" airfields were mostly fully equipped but did not have the sector control room which allowed "Sector" airfields such as Biggin Hill to monitor and control RAF fighter formations. RAF units from Sector airfields often flew into a satellite airfield for operations during the day, returning to their home airfield in the evenings.
- Irving 1974, pp. 118–119: Irving's sources were General Franz Halder and the OKW War Diary for 14 September 1940. Keitel's notes, ND 803-PS, record the same.
- Bungay refers to the 14 September meeting with Milch and Jeschonnek. Hitler wanted to keep up the "moral" pressure on the British Government, in the hope it would crack. Bungay indicates that Hitler had changed his mind from the day before, refusing to call off the invasion for the time being.
- This proposal has since been confused, or conflated, with a possible flight by HMG in exile.
- This is sometimes erroneously believed to refer to the entire RAF.
- The exact percentage was 28. The Luftwaffe deployed 5,638 aircraft for the campaign. 1,428 were destroyed and a further 488 were damaged, but were repairable.
- Bob Hurst. "No. 1 Squadron City of Westmount". canadianwings.com. Retrieved 28 October 2015.
- Richards, P.156
- "Canada in the Making - Constitutional History". canadiana.ca. Retrieved 28 October 2015.
- Stacy, p.255
- Peszke 1980, p. 134.
- Foreman 1989, p. 8.
- Terraine 1985, p. 219.
- Haining 2005, p. 68.
- Bungay 2000, p. 107.
- Wood and Dempster 2003, p. 318.
- Bungay 2000, p. 368.
- Ramsay 1989, pp. 251–297.
- "Battle of Britain RAF and FAA Roll of Honour." RAF.. Retrieved: 14 July 2008.
- Wood and Dempster 2003, p. 309.
- Bungay 2000, p. 373.
- Overy 2001, p. 113.
- Goodenough 1982, p. 22.
- "Introduction to the Phases of the Battle - History of the Battle of Britain - Exhibitions & Displays - Research". RAF Museum. Retrieved 5 November 2015.
- Overy 2013, pp. 73–74.
- "92 Squadron – Geoffrey Wellum." Battle of Britain Memorial Flight via raf.mod.uk.. Retrieved: 17 November 2010, archived 2 March 2009.
- Bungay 2000, pp. 31–33.
- Bungay 2000, pp. 305–306.
- Bungay 2000, p. 388.
- Stacey 1955, p.18
- "Battle of Britain - finest hour speech" on Youtube. Retrieved: 1 February 2015.
- Williamson 2002, The Luftwaffe: Origins and Preparation
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- Craig, Phil and Tim Clayton. Finest Hour: The Battle of Britain. New York: Simon & Schuster, 2000. ISBN 0-684-86930-6 (hardcover); 2006, ISBN 0-684-86931-4 (paperback).
- Cumming, Anthony J. The Royal Navy and The Battle of Britain. Annapolis, Maryland: Naval Institute Press, 2010. ISBN 978-1-59114-160-0.
- Fiedler, Arkady. 303 Squadron: The Legendary Battle of Britain Fighter Squadron. Los Angeles: Aquila Polonica, 2010. ISBN 978-1-60772-004-1.
- Fisher, David E. A Summer Bright and Terrible: Winston Churchill, Lord Dowding, Radar and the Impossible Triumph of the Battle of Britain. Emeryville, CA: Shoemaker & Hoard, 2005. ISBN 1-59376-047-7 (hardcover,); 2006, ISBN 1-59376-116-3 (paperback).
- Foreman, John. Battle of Britain: The Forgotten Months, November And December 1940. Wythenshawe, Lancashire, UK: Crécy Publishing, 1989. ISBN 1-871187-02-8.
- Gaskin, Margaret. Blitz: The Story of 29 December 1940. New York: Harcourt, 2006. ISBN 0-15-101404-3.
- Haining, Peter. The Chianti Raiders: The Extraordinary Story of the Italian Air Force in the Battle of Britain. London: Robson Books, 2005. ISBN 1-86105-829-2.
- Haining, Peter. Where the Eagle Landed: The Mystery of the German Invasion of Britain, 1940. London: Robson Books, 2004. ISBN 1-86105-750-4.
- Halpenny, Bruce Barrymore. Action Stations: Military Airfields of Greater London v. 8. Cambridge, UK: Patrick Stephens, 1984. ISBN 0-85039-885-1.
- Harding, Thomas. "It's baloney, say RAF aces". The Telegraph, 24 August 2006. Retrieved: 3 March 2007.
- Hough, Richard. The Battle of Britain: The Greatest Air Battle of World War II. New York: W.W. Norton, 1989. ISBN 0-393-02766-X (hardcover); 2005, ISBN 0-393-30734-4(paperback).
- James, T.C.G. The Battle of Britain (Air Defence of Great Britain; vol. 2). London/New York: Frank Cass Publishers, 2000. ISBN 0-7146-5123-0(hardcover); ISBN 0-7146-8149-0 (paperback,).
- James, T.C.G. Growth of Fighter Command, 1936–1940 (Air Defence of Great Britain; vol. 1). London; New York: Frank Cass Publishers, 2000. ISBN 0-7146-5118-4.
- James, T.C.G. Night Air Defence During the Blitz. London/New York: Frank Cass Publishers, 2003. ISBN 0-7146-5166-4.
- McGlashan, Kenneth B. with Owen P. Zupp. Down to Earth: A Fighter Pilot Recounts His Experiences of Dunkirk, the Battle of Britain, Dieppe, D-Day and Beyond. London: Grub Street Publishing, 2007. ISBN 1-904943-84-5.
- March, Edgar J. British Destroyers; a History of Development 1892–1953. London: Seely Service & Co. Limited, 1966.
- Olson, Lynne and Stanley Cloud. A Question of Honor: The Kościuszko Squadron: Forgotten Heroes of World War II. New York: Knopf, 2003. ISBN 0-375-41197-6. NB: This book is also published under the following title:
- For Your Freedom and Ours: The Kościuszko Squadron – Forgotten Heroes of World War II.
- Prien, Jochen and Peter Rodeike.Messerschmitt Bf 109 F,G, and K: An Illustrated Study. Atglen, Pennsylvania: Schiffer Publishing, 1995. ISBN 0-88740-424-3.
- Ray, John. Battle of Britain. London: The Orion Publishing Co., 2003. ISBN 1-85409-345-2.
- Ray, John Philip. The Battle of Britain: Dowding and the First Victory 1940. London: Cassel & Co., 2001. ISBN 0-304-35677-8.
- Ray, John Philip. The Battle of Britain: New Perspectives: Behind the Scenes of the Great Air War. London: Arms & Armour Press, 1994 (hardcover, ISBN 1-85409-229-4); London: Orion Publishing, 1996 (paperback, ISBN 1-85409-345-2).
- Rongers, Eppo H. De oorlog in mei '40, Utrecht/Antwerpen: Uitgeverij Het Spectrum N.V., 1969, No ISBN
- Townsend, Peter. Duel of Eagles (new edition). London: Phoenix, 2000. ISBN 1-84212-211-8.
- Wellum, Geoffrey. First Light: The Story of the Boy Who Became a Man in the War-Torn Skies Above Britain. New York: Viking Books, 2002. ISBN 0-670-91248-4 (hardcover); Hoboken, NJ: Wiley & Sons, 2003. ISBN 0-471-42627-X (hardcover); London: Penguin Books, 2003. ISBN 0-14-100814-8 (paperback).
- Zaloga, Steven J. and Richard Hook. The Polish Army 1939–45. London: Osprey, 1982. ISBN 0-85045-417-4.
- Day by Day blog charting the progress of the Battle by ex RAF veteran
- Battle Of Britain Historical Society
- video: on YouTube, (52 min.) complete film documentary by Frank Capra made for U.S. Army
- The Battle of Britain "In Photos"
- Royal Air Force history
- Battle of Britain Memorial
- BBC History Overview of Battle
- Historical recording BBC: Churchill's "This Was Their Finest Hour" speech
- Radio New Zealand 'Sounds Historical' ANZAC Day, 25 April 2008: Historical recording of Sir Keith Park describing the Battle of Britain.(Scroll down to 10:50 am).
- Air Chief Marshal Hugh Dowding on the Battle of Britain (despatch to the Secretary of State, August 1941)
- Royal Engineers Museum: Royal Engineers during the Second World War (airfield repair)
- Shoreham Aircraft Museum
- Tangmere Military Aviation Museum
- Kent Battle of Britain Museum
- ADLG Visits RAF Uxbridge Battle of Britain Operations Room
- British Invasion Defences
- The Falco and Regia Aeronautica in the Battle of Britain
- History of North Weald Airfield
- The Royal Mint Memorial website
- New Zealanders in the Battle of Britain (NZHistory.net.nz)
- New Zealanders in the Battle of Britain (official history)
- Battle for Britain, short film starring Julian Glover
- Interactive map showing Battle of Britain airfields and squadrons by date