The document that formally ended the Vietnam War and withdrew U.S. troops in the 1970s was the Paris Peace Accords, signed on January 27, 1973. This agreement aimed to establish peace in Vietnam and serve as a framework for withdrawal and the exchange of prisoners. It sought to halt hostilities between North and South Vietnam, although the conflict continued for two more years post-agreement. The accords marked a significant shift in U.S. foreign policy and military involvement in Southeast Asia, reflecting growing anti-war sentiment at home and shaping future diplomatic approaches.