It depends on when in 1973 you're talking about. On March 23, 1973, as a result of the Paris Peace Accords, the US withdrew its remaining 2500 troops. The Department of Defense lists 1973 troop levels (presumably after the aforementioned troop withdrawal) at 50 US troops and 111000 South Vietnamese troops.
The US began reducing Vietnam troop strength in late 1971, and all U.S. troops were out of Vietnam by April 25, 1973. When Saigon fell to North Vietnam communist soldiers in 1975, America had been out of the war for two years.
69,000
LBJ
In keeping with his pre-election promise, President Nixon began the first phase of troop withdrawals in 1969.
Korean War Vietnam War
Troop withdrawal started in 1973 and ended in 1975.
The US began reducing Vietnam troop strength in late 1971, and all U.S. troops were out of Vietnam by April 25, 1973. When Saigon fell to North Vietnam communist soldiers in 1975, America had been out of the war for two years.
Australian maintained a troop level of approximately 8,000 men in Vietnam during the war.
"A" Troop was the only Troop from the 12th Cavalry sent to Vietnam.
Lee Troop was born on 1973-03-22.
LBJ
69,000
Timely troop movements, troop support, supplies, and strategic air stikes.
South Vietnam was overrun by communist forces.
See website: Vietnam War
Slow and Honorable
they had the runs and were out of toilet paper