From the NY Times: PTSD and war – a perspective from Sophocles.

The ancient Greeks had a shorthand for the mental anguish of war, for post-traumatic stress disorder and even for outbursts of fratricidal bloodshed like last week’s shootings at Fort Hood. They would invoke the names of mythological military heroes who battled inner demons: Achilles, consumed by the deaths of his men; Philoctetes, hollowed out from betrayals by fellow officers; Ajax, warped with so much rage that he wanted to kill his comrades.