The correct answer is:
The Truman Doctrine
Explanation:
President Harry S. Truman (1884-1972) foreign policy, also known as The Truman Doctrine, was developed during the Cold War against the Soviet Union. The Truman Doctrine stated that the United States would help in financial and military ways any country threatened by communism, to prevent it from spreading. "Attempted subjugation" in Truman's speech refers to communism, and free peoples to those nations trying to resist it.