The My Lai massacre was a war crime committed by the United States Army on 16 March 1968, involving the mass murder of unarmed civilians in Sơn Mỹ village, Quảng Ngãi province, South Vietnam, during the Vietnam War. At least 347 and up to 504 civilians, mostly women, children, and elderly men, were murdered by U.S. soldiers primarily from Company C, 1st Infantry Battalion, 20th Regiment, 11th Brig... Wikipedia