The correct answer is the Truman Doctrine. The Truman Doctrine was a policy proposed by President Harry S. Truman in 1947. It marked the first formal commitment made by the United States to the containment of communism. The doctrine was a response to the growing influence of Soviet communism in Eastern Europe and the threat it posed to democracy and the stability of the world. It provided military and economic assistance to countries facing communist expansion, primarily Greece and Turkey at the time. The Truman Doctrine was instrumental in shaping the United States' foreign policy during the Cold War.
