Respuesta :
At the beginning of the war, most of the fighting took place in the South where the Republic of Vietnam (I think the abbreviation is RVN) regime backed by the United States defended itself against Viet Cong insurgencies backed by the Democratic Republic of Vietnam (I think the abbreviation is DRV).
Vietnam, South Vietnam, North Vietnam, Laos, and Southeast Asia were the places that the Vietnam War took place in.