Final answer:
US troops officially withdrew from the Vietnam War in 1973 after the signing of the Paris Peace Accords, but the war continued until 1975 when Saigon fell and Vietnam was united under a communist government.
Step-by-step explanation:
The withdrawal of US soldiers from the Vietnam War began after an agreement was reached during the Paris Peace Accords, signed on January 27, 1973. This agreement marked the official end of U.S. military involvement in the Vietnam War. However, the complete withdrawal of American troops was completed within sixty days following the accords. North Vietnam and the United States had agreed upon the withdrawal, but the war itself continued until April 30, 1975, when North Vietnam captured Saigon, leading to the end of the war and the unification of Vietnam under a communist government. The legacy of the Vietnam War is marked by significant loss, with over 58,000 American fatalities and profound political consequences in Southeast Asia.