Trivia: Which U.S. ally sent the most troops to the Vietnam War?
Australia
New Zealand
Germany
South Korea
The correct answer is South Korea
So why is this answer correct? : Approximately 2,700,000 American soldiers fought in Vietnam, and they were joined by 320,000 South Korean allies. In return, the United States provided South Korea with economic support. The U.S. received support from 60,000 Australians, 37,000 soldiers from Thailand, and 3,000 from New Zealand.