Unit cohesion in the United States military

Unit cohesion in the United States military it has been the subject of dispute and political debate since World War II as the United States military has expanded the categories of citizens it accepts as servicemembers. 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". The concept lacks a consensus definition among military analysts, sociologists, and psychologists.

Henning 2009, pp. 1-16 has identified some factors in unit cohesion:

Prior to US Executive Order 9981, issued on July 26, 1948 by President Harry S. Truman, the American military was segregated. Opponents of racial integration frequently alleged that integrating the armed forces would have detrimental effects on unit cohesion.

Brian Mitchell, in his article "Women Make Poor Soldiers" (excerpted from his 1989 book "Weak Link: The Feminization of the American Military"), expressed concern that placing women in combat lowers unit cohesion, either due to sexual relationships taking priority over group loyalty, or because men would feel obliged to be more protective of women than other men. Mitchell's view was harshly criticized in a New York Times review, which stated the book was "spoiled by intemperate allegations and a supercilious tone" and lacked sourcing for statements.

Air Force Instruction 36-2909 on Professional and Unprofessional Relationships says:

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