References: The Early Cold War (1945–1960)¶
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Cold War - Wikipedia - Comprehensive overview of the ideological and geopolitical competition between the United States and Soviet Union from 1947 to 1991, covering containment, proxy wars, nuclear deterrence, and the arms race.
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McCarthyism - Wikipedia - Details Senator McCarthy's anticommunist crusade, the House Un-American Activities Committee, Hollywood blacklists, and the eventual censure of McCarthy — a case study in political fear and civil liberties.
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Marshall Plan - Wikipedia - Explains the European Recovery Program, its $13 billion in economic aid to Western Europe, its strategic purpose of blocking communist expansion, and its role in rebuilding the post-war international order.
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John Lewis Gaddis, The Cold War: A New History (2005) - Penguin Press - Concise, authoritative overview by the leading Cold War historian, drawing on newly declassified Soviet-bloc archives to reassess the conflict's origins, dynamics, and end.
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Ellen Schrecker, Many Are the Crimes: McCarthyism in America (1998) - Princeton University Press - Comprehensive history of anti-communist repression, arguing that McCarthyism extended far beyond McCarthy himself into institutions across American life.
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Digital History: The Cold War - University of Houston - Primary sources and essays on the Truman Doctrine, Marshall Plan, Berlin Blockade, Korean War, McCarthyism, and early nuclear strategy.
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National Security Archive: Cold War Documents - George Washington University - Declassified government documents on Cold War policy, including NSC-68, the X Article, and CIA Cold War operations; primary sources for advanced students.
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Avalon Project: Truman Doctrine (1947) - Yale Law School - Full text of President Truman's March 1947 address to Congress requesting aid for Greece and Turkey — the foundational document of U.S. containment policy.
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Atomic Archive - Atomic Archive - Educational resources on the nuclear arms race, including a history of the arms race from Trinity through the Cuban Missile Crisis, with primary documents and photographs.
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Khan Academy: The Cold War - Khan Academy - Article and video series covering containment, the Marshall Plan, NATO, the Korean War, McCarthyism, and the Eisenhower era; good for building the chronological framework.