Truman Doctrine

After the war, Britain's economy was badly hurt and they could no longer aid non-communist countries liked they did before. Therefore, Britain asked the Untied States to take responsibilityof aiding nations. Harry S. Truman, the president at the time, asked congress for $400 million for economic and military aid for Turkey and Greece. Truman then declared that the U.S should aid all countries resisting communism or "outside pressures."
Though the doctrine seemed fullproof, it also had many critics. The people that were aginst the Truman Doctrine believed that it would interfer with iternational affairs or they were against supporting any dictators, even if they were anti-communist. Even though not everyone agreed, congress decided the doctrine was necessary in order to prevent Communist influence and between 1947-1950, $400 million was sent to Turkey and Greece.
Giving other nations an opportunity to be aided makes them have to choose sides. They can either have help from the United States in return for their promise to not be under Communist rue or be a Communist country. Countries were pressured into choosing sides by the Truman Doctrine and the Soviet Union could decide to compete for nation's promise.