when did the last american combat troops leave vietnam
Vietnam War Vietnamization was again tested by the Easter Offensive of 1972, a massive conventional NVA invasion of South Vietnam. The NVA and Viet Cong quickly overran the northern provinces and in coordination with other forces attacked from Cambodia, threatening to cut the country in half. U.S. troop withdrawals continued. American airpower responded, beginning Operation Linebacker, and the offensive was halted. However, it became clear that without American airpower South Vietnam could not survive. The last remaining American ground troops were withdrawn by the end of March 1973; U.S. naval and air forces remained in the Gulf of Tonkin, as well as Thailand and Guam.[255]