The Marshall Plan was approved in early 1948, and the good relationships that the aid created worked against the expansion of communism. In the Marshall Plan the United States gave about $13 billion in grants and loans to nations in Western Europe.
In 1957 Eisenhower announced that the United States would use force to help any Middle Eastern nation threatened by communism.
" I will use force!"
The Truman administration used the Smith Act to cripple the Communist Party in the United States. It made it unlawful to teach or advocate the violent overthrow of the U.S government.