Winter Soldier is a 1972 American documentary film chronicling the Winter Soldier Investigation, which took place in Detroit, Michigan, from January 31 to February 2, 1971. The film documents the accounts of American soldiers who returned from the War in Vietnam and participated in this war crimes hearing.

Barbara Kopple is an American film director known primarily for her documentary work. She is credited with pioneering a renaissance of cinema vérité, and bringing the historic french style to a modern American audience. She has won two Academy Awards, for Harlan County, USA (1977), about a Kentucky miners' strike, and for American Dream (1991), the story of the 1985–86 Hormel strike in Austin, Minnesota, making her the first woman to win two Oscars in the Best Documentary category.