Band of Brothers

p. 203

“’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 steadily less valuable thereafter until he was completely useless.’” It appears that human beings are not designed for combat.