The historical event associated with the fall of Saigon is the end of the Vietnam War, which culminated in the capture of Saigon on April 30, 1975, by North Vietnamese forces. This marked a definitive conclusion to a protracted conflict involving the communist North Vietnam and the anti-communist South Vietnam, which had been supported by the United States. The fall of Saigon symbolized the collapse of the South Vietnamese government and led to the reunification of Vietnam under communist control. This event had significant implications for U.S. foreign policy and left a lasting impact on Vietnam and its citizens.