Shortly before 8 am on 16 March 1968, C Company, 1st Battalion, 20th Regiment, 11th Brigade, Americal Division, on a search-and-destroy mission in Quang Ngai Province, South Vietnam, entered the hamlet of My Lai. By noon more than 400 women, children and old men had been systematically murdered. To this day, the My Lai massacre has remained the most shocking episode of the Vietnam War. Yet this in...