The Cold War (1945–1991)

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1Summary 重點摘要

The Cold War was total US–Soviet rivalry without direct war: capitalism vs communism, NATO vs Warsaw Pact, nuclear and space races, proxy wars. The Berlin Wall (1961) symbolised it; the Wall fell in 1989 and the USSR dissolved in 1991 — the Cold War ended.

2Vocabulary cards Vocabulary

3Step by step Steps

1. Opening (1945–49)The Cold War moved from rivalry to institutions: the Truman Doctrine of 1947 pledged American support to all nations threatened by communism, making containment official policy, while the Marshall Plan poured some thirteen billion dollars into rebuilding Western Europe and bound the West together economically. When Moscow blockaded West Berlin in 1948-49, Britain and America supplied the whole city by airlift until the blockade was lifted, and in 1949 twelve western nations founded NATO, fixing the collective-defence system in place.
2. EscalationAfter West Germany joined NATO in 1955, the Soviet Union answered by forming the Warsaw Pact with its Eastern European satellites, and two armed camps faced each other across the continent. The nuclear race climbed from atomic to hydrogen bombs and intercontinental missiles, with warheads numbered in the tens of thousands; the space race ran alongside — Sputnik's launch in 1957 shook the West, and American astronauts reached the Moon in 1969. Competition in arms and technology touched every corner of life.
3. CrisesIn 1961 East Germany sealed East and West Berlin behind the Wall, the starkest symbol of the divide; in 1962 the Cuban Missile Crisis broke out when Soviet missiles were placed in America's backyard, and a naval blockade held the superpowers face to face for thirteen days at the edge of nuclear war — remembered as the Cold War's most dangerous moment. The crisis ended with Soviet missiles withdrawn and American missiles quietly removed from Turkey; a hotline between Washington and Moscow followed to prevent future misjudgement.
4. Proxy warsThe superpowers never fought each other directly, contending instead through third countries: the Korean War (1950-53) left the peninsula divided to this day; the Vietnam War (1955-75) mired America in a quagmire, its casualties and protest movements shaking the nation; and the Soviet invasion of Afghanistan (1979-89) drained Moscow in its turn. The proxy wars cost the Third World countless lives, yet never escalated to direct superpower combat — the deterrent shadow of nuclear weapons was plain.
5. Détente & endThe 1970s brought détente: arms-limitation treaties were signed and summit visits exchanged, easing tension for a time. In the late 1980s Gorbachev's reforms loosened Moscow's grip, in 1989 the Eastern European regimes fell and the Berlin Wall came down, and in 1991 the Soviet Union dissolved — the Cold War was over. The bipolar world gave way to an American-led unipolar moment, and the post-Cold War international order had to be built anew.
6. The arms race and MADAt the height of the Cold War each superpower held tens of thousands of nuclear warheads, enough to destroy the other many times over; from this grew the logic of 'mutually assured destruction' — any first strike would invite annihilating retaliation, so neither dared move first. This grim balance kept the hot war from starting, yet for the first time humanity lived under the shadow of self-destruction, and arms-control talks became the only way out.
7. The end of the Cold WarGorbachev's policies of 'openness' and 'restructuring' relaxed Moscow's control over Eastern Europe and triggered the upheavals of 1989: the regimes of Poland, Hungary, East Germany and their neighbours fell in succession, and the Berlin Wall came down amid public celebration. In 1991 the Soviet Union itself dissolved as its reforms slipped out of control, formally ending the Cold War. Forty-odd years of confrontation closed without a shot, and the ideological contest and burden of arms were widely seen as the deep causes of Soviet collapse.

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8Recap Recap

• Cold War = total US–Soviet rivalry (no direct war)
• NATO vs Warsaw Pact; nuclear + space races; proxy wars
• Wall falls 1989 → USSR dissolves 1991 = the end
• The Truman Doctrine (1947) and Marshall Plan opened the confrontation
• The Cuban Missile Crisis (1962) = the closest brush with nuclear war