" In war it is not just the weak soldiers, or the sensitive ones, or the highly imaginative or cowardly ones, who will break down. Inevitably, all will break down if in combat long enough […] As medical observers have reported, “There is no such thing as ‘getting used to combat’ … Each moment of combat imposes a strain so great that men will break down in direct relation to the intensity and duration of their experience.” Thus – and this is unequivocal: ‘Psychiatric casualties are as inevitable as gunshot and shrapnel wounds in warfare. "

― Paul Fussell , Wartime: Understanding and Behavior in the Second World War