On Killing: The Psychological Cost of Learning to Kill in War and Society

by Dave Grossman

This state of physical and mental exhaustion is one of the earliest symptoms. Increasingly unsociable and overly irritable, the soldier loses interest in all activities with comrades and seeks to avoid any responsibility or activity involving physical or mental effort. He becomes prone to crying fits or fits of extreme anxiety or terror. There will also be such somatic symptoms as hypersensitivity to sound, increased sweating, and palpitations. Such fatigue cases set the stage for further and more complete collapse. If the soldier is forced to remain in combat, such collapse becomes inevitable; the only real cure is evacuation and rest.

the crying is what effected me the most...