Western leaders believed that once a country became communist, communism would___other nations in the region. The United States'policy aimed to stop countries from becoming communist. In support of this policy, the Truman Doctrine helped free nations By helping European nations the Marshall Plan strengthened them against the threat of communism.​

Western leaders believed that once a country became communist, communism would SPREAD TO other nations in the region. The United States' containment policy aimed to stop countries from becoming communist. In support of this policy, the Truman Doctrine helped free nations resist commumism

By helping European nations recover from the war the Marshall Plan strengthened them against the threat of communism.​