There is no overview of this problem, so far as I know, but the following touch on various aspects: John Keegan, The Face of Battle (Penguin, 1983); Gerald Linderman, Embattled Courage (Free Press, 1987); Denis Winter, Death’s Men: Soldiers in the Great War (Penguin, 1985); Cols. William S. Mullins and Albert J. Glass, Neuropsychiatry in World War II (Government Printing Office, 1973); Peter Bourne, Men, Stress and Vietnam (Little, Brown, and Co.,1970). The last two are medical works, and the Bourne is mercifully short.

—R.J.S.