Key term for OCR GCSE History A, used in The USA 1945–1974.
US foreign policy announced in 1947 providing economic and military aid to countries resisting Communism, establishing the principle of containment.
Truman Doctrine appears in OCR GCSE History A revision content for Non-British Depth Studies, especially The USA 1945–1974 and Post-war Challenges 1945–1954.
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