 On 30 January 1968, North Vietnam launched the Tet Offensive (the General Offensive and Uprising of Tet Mau Than, 1968).Although a military failure for the guerrillas and the army, it was a successful psychological warfare operation that decisively turned international public opinion against the United States intervention to the Vietnamese civil war, with the military withdrawal of the United States from Vietnam in 1973 and the subsequent and consequent Fall of Saigon to the North Vietnamese army on 30 April 1975.With the end of the Vietnam War, Marxist–Leninist regimes were established in Vietnam's neighbour states.