Communists reunite Vietnam and occupy Saigon (now Ho Chi Minh City) without a fight following April 30 surrender of South Vietnam. The last U.S. personnel escape by helicopter from the roof of the U.S. Embassy, leaving behind a throng of frantic non-communist Vietnamese. Many flee as communist forces gained ground since President Nixon's "Vietnamization" policy began in 1968 after the Tet Offensive and bitter U.S. opposition to the war.

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