The treaty that marked the end of the Vietnam War was the Paris Peace Accords, signed on January 27, 1973. This agreement aimed to establish peace in Vietnam and to end the United States' involvement in the conflict, which had been ongoing since the late 1950s. The accords stipulated the withdrawal of U.S. troops, a ceasefire, and guidelines for political reconciliation between North and South Vietnam. While the treaty effectively ended direct American military involvement, it did not result in lasting peace, as fighting continued until North Vietnam's victory in 1975, leading to the reunification of Vietnam under communist control.