Winter Soldier documents the "Winter Soldier Investigation" conducted by Vietnam Veterans Against the War (VVAW) in Detroit, Michigan in the winter of l971. A call went out from VVAW to veterans all over the country saying, in effect, 'everyone is talking about the war that you know from the inside. If you want to have anything to say about it, come to Detroit and tell it like you saw it.' At the investigation, over 125 veterans representing every major combat unit to see action in Vietnam, gave eye-witness testimony to war crimes and atrocities they either participated in or witnessed. The purpose of the investigation was to bring to light the nature of American military policy in Vietnam.