The major treaty that ended the Vietnam War was the Paris Peace Accords, signed on January 27, 1973. The agreement aimed to establish peace in Vietnam and bring an end to the conflict that had escalated since the 1960s. Key provisions included a ceasefire, the withdrawal of U.S. troops, and the recognition of the 17th parallel as a temporary dividing line between North and South Vietnam. Although the accords led to the withdrawal of American forces, they did not result in lasting peace in Vietnam, as fighting continued, and North Vietnam eventually succeeded in unifying the country under communist control in 1975.