U.S. troop strength reaches five-year low - Oct 29, 1971 - HISTORY.com

The total number of U.S. troops remaining in Vietnam drops to 196,700–the lowest level since January 1966. This was a result of the Vietnamization program announced by President Richard Nixon at the June 1969 Midway Conference. U.S. troops were to be withdrawn as the South Vietnamese assumed more responsibility for the war. The first withdrawal included troops from the 9th Infantry Division, who departed in August 1969. The withdrawals continued steadily, and by January 1972 there were less than 75,000 U.S. troops remaining in South Vietnam.