The Vietnam War began as a conflict between North Vietnam and South Vietnam following the end of French colonial rule. The United States initially provided support to France in its war against Ho Chi Minh and later directly intervened in the war under the Eisenhower and Johnson administrations due to fears that communism would spread across Southeast Asia if North Vietnam prevailed. Despite massive U.S. military escalation and bombing campaigns, the Vietnam War became increasingly unpopular at home due to rising casualties and anti-war protests. The Tet Offensive of 1968 marked a major turning point that turned U.S. public opinion against the war, and the Nixon administration pursued a policy of Vietnamization to gradually withdraw U.S. troops while turning over more responsibility