Unit cohesion is a military concept, defined by one former United States Chief of staff in the early 1980s as "the bonding together of soldiers in such a way as to sustain their will and commitment to each other, the unit, and mission accomplishment, despite combat or mission stress". However the concept lacks a consensus definition among military analysts, sociologists and psychologists.
Several scholars have cited the influence of Sigmund Freud's thinking on theories of unit cohesion. A number of them noted that Freud wrote of cohesion breakdown among soldiers, asserting that it leads to panic, insubordination, self-interested rather than cooperative reactions to threats, and "a gigantic and senseless dread".
The later development of the concept is strongly informed by the work of Morris Janowitz, who, with Edward Shils, began writing on the topic in the late 1940s. Janowitiz continued to work in this area in his sociological work, as the disruptive policy of frequently rotating individual soldiers and officers during the Vietnam War came under scrutiny as a large factor behind low morale.
Following the studies of several World War II armies, sociologists concluded that comradely ties between small combat units is a decisive factor in providing good morale, cohesion, and organization framework.
The defeat of the Western forces by the poorly equipped Chinese People's Liberation Army in the Korean War in 1950 further generated interest on the role of "human elements" on modern battlefields. Although Western armies traditionally created ties between soldiers through informal means such as teamwork or shared hardships instilled by discipline, the Chinese army relied on formal methods to assimilate recruits into their units. The assimilation process involved features such as coercive persuasion, surveillance, and political control, while military ranks and physical punishments were abolished to allow closer relations between officers and soldiers. The stringent assimilation methods allowed the Chinese to create high morale and cohesion compared to the Western forces. However, high casualty rates and the lack of modern equipment later resulted in a significant erosion of morale and cohesion as the Korean War dragged on. One of the worst cases of this erosion was the partial disintegration of the Chinese army during the spring offensive in May 1951.
In the late 1980s, one researcher stated that, regardless of whether unit cohesion was an actual motivator or merely a stabilizer, what mattered was that unit cohesion "enhanced fighting power", because it reduced "combat inhibitors (stress, fear, isolation)" and promoted "esprit de corps, morale and teamwork". Other research has, however, concluded that there is value in distinguishing the components of social cohesion and "[t]ask cohesion ... the commitment to working together on a shared goal", since some studies conclude that unit effectiveness correlates strongly with task cohesion, not with social cohesion. This debate about the relative importance, or even need for, the concepts of social cohesion and task cohesion is exemplified by an exchange between Anthony King and Guy Siebold in the journal Armed Forces & Society in 2006–2007.
One U.S. military researcher has drawn a distinction between teamwork and unit cohesion—claiming teamwork as being merely "collaboration", while unit cohesion involves a bond that can sustain mutual commitment, not just to the mission, but to each other, and to the group as a whole. This added bond, he argued, enabled teamwork under conditions under which an organization might otherwise break down.
New uses of unit cohesion in research
The concept of cohesion was originally used primarily to examine combat behavior. However, more recently models of cohesion have been applied to other phenomena characterized by stress, uncertainty, and the strategic interaction of groups. Uzi Ben-Shalom et al. looked at cohesion during Israeli Defense Force operations in the Occupied Territories during the al-Aqsa Intifada, while Paul Bartone and Amy Adler examined cohesion in a multi-national peacekeeping operation. Terence Lee used a broad concept of cohesion to explain military behavior during events in China in 1989 and Indonesia in 1998 and, in another article, the Philippines in 1986 and Indonesia in 1998.
Lucan Way and Steven Levitsky also used a broad concept of cohesion in order to explain regime maintenance in the former Soviet Union. Jesse Lehrke developed a multi-level model to facilitate the use of both social and task cohesion for examining military behavior during revolutions. Less elaborate versions of this approach can also be seen in work by Dale Herspring and earlier work by Jesse Lehrke.
- Esprit de corps
- Unit cohesion in the United States military
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- Lehrke, Jesse P. (2013). "A Cohesion Model to Assess Military Arbitration of Revolutions." Armed Forces & Society. Vol. 40, No. 1: 146-167.
- Siebold, Guy L. (2011). "Key Questions and Challenges to the Standard Model of Military Group Cohesion." Armed Forces & Society. Vol. 37, No. 3: 448-468.
- "Assessing cohesion in small units" - Chapter III of Cohesion: the Human Element in Combat, Wm. Darryl Henderson, National Defense University Press, 1985. ISBN 1-4289-8208-6.
- Citizen Soldiers and Civilian Contractors: Military Outsourcing, Unit Cohesion, and Retention Attitudes. Ryan Kelty. Defense Equal Opportunity Management Institute, 2009
- Unit Cohesion among the Three Soviet Women's Air Regiments During World War II (Phd dissertation). Jessica Leigh Bhuvasorakul, Florida State University College of Social Sciences, Spring 2004.
- "Does Social Cohesion Determine Motivation in Combat? An Old Question with an Old Answer" Robert J. MacCoun (University of California, Berkeley), Elizabeth Kier (University of Washington), Aaron Belkin (University of California, Santa Barbara). Armed Forces & Society, Volume 32 Number 1 Jan 2005 1-9.
- "Morale and Cohesion in Military Psychiatry, Fred Manning, p.4 in Military Psychiatry: Preparing in Peace for War, ISBN 0-16-059132-5; Manning cites Meyer, EC, "The unit", Defense, 1982;82(February):1-9
- Brian Palmer (2010), "Pentagon Sees Little Risk in Allowing Gay Men and Women to Serve Openly" Slate (magazine), Dec. 1, 2010
- Cox, Alexander A. (1995). "Unit cohesion and morale in combat: survival in a culturally and racially heterogeneous environment" (PDF). For Leavenworth, KS: School of Advanced Military Studies. Retrieved 2011-04-25.
... Clausewitz makes the inference that the unit cohesion is more a factor of the morale of the unit as a whole rather than an equally decisive factor. He does not, however, underrate the value of cohesion. He wrote that the loss of order and cohesion in a unit often makes even the resistance of individual units fatal for them.
- van Epps (2008-12-31), "Relooking Unit Cohesion: A sensemaking approach", Military Review
- Czander, William (1993). The psychodynamics of work and organizations : theory and application. New York: Guilford Press. p. 21. ISBN 0-89862-284-0.
Freud maintains that cohesion is found in a group when all members introject the same subject into their ego ideal and then identify with each other. ... This phenomenon explains why soldiers willingly give up their thinking capacity and blindly follow orders from their leader. ... The soldiers as a group become a cohesive unit because they have all identified with each other.
- "Why soldiers fight. Part I. Leadership, cohesion and fighter spirit." Robert B. Smith, 1983, Quality & Quantity, Volume 18, Number 1, 1–32, doi:10.1007/BF00221449
- Sigmund Freud (1922). Group Psychology and the Analysis of the Ego. Chapter V. Two Artificial Groups: The Church and the Army
- Giuseppe Caforio, , Handbook of the Sociology of the Military, p.63, Springer, 2006. ISBN 0-387-32456-9. "The first attempt to establish a theory of cohesion and effectiveness within combat troops belongs to Edward Shils and Morris Janowitz (Shils and Janowitz, 1948). ..."
- Milam, John R. (2009). Not a gentleman's war: an inside view of junior officers in the Vietnam War, p. 142, UNC Press Books, ISBN 0-8078-3330-4
- George, Alexander (1967). The Chinese Communist Army in Action: The Korean War and its Aftermath. New York, NY: Columbia University Press.
- George 1967, p. vii.
- George 1967, p. 27.
- George 1967, p. 29.
- George 1967, pp. 31–35.
- George 1967, pp. 36-38.
- George 1967, p. 5.
- George 1967, p. 164.
- George 1967, p. 195–196.
- Roger Kaplan (1987). "Army Unit Cohesion in Vietnam: A Bum Rap" , U.S. Army War College.
- Anthony King, "The Word of Command: Communication and Cohesion in the Military," Armed Forces and Society 32, 4 (2006): 493–512; Guy L. Siebold, "The Essence of Military Group Cohesion," Armed Forces and Society 33, 2 (2007), 286–295; Anthony King, "The Existence of Group Cohesion in the Armed Forces: A Response to Guy Siebold," Armed Forces and Society 33, 4 (2007): 638–645.
- Guy L. Siebold, "The Evolution of the Measurement of Cohesion," Military Psychology 11, 1 (1999). For an interesting example see Osiel, Obeying Orders: Atrocity, Military Discipline, and the Law of War.
- Paul Bartone and Amy Adler, "Cohesion over Time in a Peacekeeping Medical Task Force," Military Psychology 11, 1 (1999); Uzi Ben-Shalom, Zeev Lehrer, and Eyal Ben-Ari, "Cohesion During Military Operations: A Field Study on Combat Units in the Al-Aqsa Intifada," Armed Forces and Society 32, 1 (2005).
- Terence Lee, "Military Cohesion and Regime Maintenance: Explaining the Role of the Military in 1989 China and 1998 Indonesia," Armed Forces and Society 32, 1 (2005): 80–104; Terence Lee, "The Armed Forces and Transitions from Authoritarian Rule: Explaining the Role of the Military in 1986 Philippines and 1998 Indonesia," Comparative Political Studies 42, 5 (2009): 640–69.
- Lucan A.Way and Steven Levitsky, "The Dynamics of Autocratic Coercion after the Cold War," Communist and Post-Communist Studies 39 (2006): 387–410.
- Jesse Lehrke, "A Cohesion Model for Assessing Military Arbitration of Revolutions." Armed Forces & Society 0095327X12459851, first published on 22 January 2013 as doi: 10.1177/0095327 X12459851 (Print edition forthcoming 2013, OnlineFirst at: http://afs.sagepub.com/content/early/2013/01/18/0095327X12459851).
- Dale R. Herspring, "Undermining Combat Readiness in the Russian Military, 1992–2005" Armed Forces & Society 32, 4 (2006): 513–531; Jesse Paul Lehrke, The Transition to National Armies in the Former Soviet Republics, 1988–2005 (Oxfordshire, UK: Routledge, 2013).