The cease-fire that ended the Vietnam War stated that

The 1973 cease-fire agreement, part of the Paris Peace Accords, called for the parties to respect the South Vietnamese people’s right to self-determination. It also arranged for U.S. troop withdrawal and the return of prisoners of war, but it did not require Communist forces to withdraw from South Vietnam. Thus, the correct choice is “both parties had to respect South Vietnam’s right to self-determination.”

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