The Truman Doctrine was a policy announced by President Harry S. Truman in 1947 that aimed to contain the spread of communism by providing economic and military support to countries threatened by communist expansion.
Related terms
Marshall Plan: A program initiated by the United States in 1948 that provided billions of dollars in economic aid to help rebuild Western European countries devastated by World War II.
Containment: The U.S. foreign policy strategy during the Cold War aimed at preventing the spread of communism beyond its existing borders.
Iron Curtain: A term coined by Winston Churchill referring to the division between communist Eastern Europe and democratic Western Europe.