What was the main reason that the United States increased its military support for South Vietnam in the 1960s?

Question

Quizplus · Accepted Answer

The main reason that the United States increased its military support for South Vietnam in the 1960s was the Domino Effect of Communism.
Key Takeaway: The fear the communism would continue to grow and expand in Asia if its growth could not be stopped was termed the Domino Theory. After the 1949 revolution in China and the partition of Vietnam in 1954, it seemed that communism threatened all of Southeast Asia. So when the French left South Vietnam in the 1950s, the United States decided to take a more active role to try to stabilize the region.

What Was the Main Reason That the United States Increased