Answer: The USA was afraid that communism would spread to South Vietnam and then the rest of Asia. It decided to send money, supplies and military advisers to help the South Vietnamese Government.
Explanation:
Truman defended the Truman Doctrine that meant that if a capitalist country was being attacked America had a duty to give military aid to that country. Truman also knew that the invasion of Korea by the USSR could cause a domino effect and they would dominate one country after another. He had this knowledge since WWII with Germany’s actions.
When FDR was campaigning for his first term in office, the economy was still very much in the throes of the Great Depression.
Indeed, it was still very much in the throes of the Great Depression when FDR campaigned for his second term, although things were improving.
America argued for a unconditional surrender from Germany, and the beginning plans for the new post- war world.