“There is no such thing as ‘getting used to combat,’ ” the Army psychiatrists stated in an official report on Combat Exhaustion. “Each moment of combat imposes a strain so great that men will break down in direct relation to the intensity and duration of their exposure . . . psychiatric casualties are as inevitable as gunshot and shrapnel wounds in warfare . . . . Most men were ineffective after 180 or even 140 days. The general consensus was that a man reached his peak of effectiveness in the first 90 days of combat, that after that his efficiency began to fall off, and that he became
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