In 1971 this country withdrew its combat troops from South Vietnam.
South Korea
United States
Japan
Australia
Australia. As part of the Australia, New Zealand, United States Defense Pact (ANZUS Pact), Australia had deployed about 60,000 troops to South Vietnam. Due to anti-war protests, the Aussies withdrew all their combat forces, leaving a few logistic and training troops, but did continue humanitarian aid until 1975.