The Vietnam War began in 1954 after France lost control of Vietnam to Ho Chi Minh's Viet Minh forces. Vietnam was divided at the 17th parallel, with Ho Chi Minh controlling North Vietnam and Ngo Dinh Diem controlling South Vietnam. The US initially provided aid to Diem's repressive government in South Vietnam and gradually increased military involvement over the following decades. Despite massive US bombing campaigns and increasing troop deployments, the Tet Offensive in 1968 showed that the US was not winning the war. Growing anti-war sentiment led Nixon to begin withdrawing troops in 1973, and South Vietnam fell to Communist rule in 1975. The human and financial costs of the war were immense.