What you'll learn
This revision guide covers the Cold War period from 1945 to 1991 as specified in the WJEC GCSE History syllabus. You'll examine the ideological rivalry between the USA and USSR, major crises including Berlin and Cuba, the arms race, détente, and the eventual collapse of Soviet communism. This topic requires understanding of causation, consequence and change over time.
Key terms and definitions
Capitalism — An economic system based on private ownership, free markets and profit-making, championed by the USA and its Western allies.
Communism — A political and economic system based on state ownership of property and industry, where wealth is distributed according to need, as practised by the Soviet Union.
Containment — The American foreign policy strategy, developed from 1947, aimed at preventing the spread of communism to new countries without directly attacking the USSR.
Détente — A period of reduced Cold War tensions and improved relations between the superpowers, particularly during the 1970s.
Iron Curtain — Term coined by Winston Churchill in 1946 to describe the ideological and physical division between Soviet-controlled Eastern Europe and the democratic West.
Satellite states — Countries in Eastern Europe (Poland, Hungary, Czechoslovakia, Romania, Bulgaria, East Germany) politically and economically dominated by the Soviet Union after 1945.
Arms race — The competitive build-up of nuclear weapons and delivery systems between the USA and USSR from the late 1940s onwards.
Glasnost — Mikhail Gorbachev's policy of 'openness' introduced in the mid-1980s, allowing greater freedom of speech and information in the Soviet Union.
Core concepts
Origins of the Cold War, 1945-1949
The Grand Alliance between Britain, the USA and USSR collapsed rapidly after defeating Nazi Germany in 1945. Fundamental ideological differences between capitalism and communism created mutual suspicion.
Tension at wartime conferences:
Yalta (February 1945): Stalin, Roosevelt and Churchill agreed to divide Germany into zones of occupation and hold free elections in liberated Eastern European countries. Stalin agreed to join the war against Japan.
Potsdam (July-August 1945): New leaders Truman and Attlee took harder stances. Disagreements emerged over German reparations and Soviet control of Poland. Truman informed Stalin of the atomic bomb.
Soviet expansion in Eastern Europe:
Stalin installed communist governments in Poland, Hungary, Romania and Bulgaria by 1947, breaking promises of free elections. This created a buffer zone of satellite states protecting the USSR from future Western invasion.
The Truman Doctrine (March 1947):
President Truman pledged to support "free peoples" resisting communism, initially providing $400 million aid to Greece and Turkey. This marked America's formal commitment to containment.
The Marshall Plan (1948):
The USA offered $12.7 billion in economic aid to rebuild war-damaged European economies. Sixteen Western nations accepted; Stalin forced Eastern European countries to refuse. The plan successfully strengthened Western Europe and tied it economically to America.
Berlin Blockade and Airlift (1948-1949):
When Western powers introduced a new currency in their German zones, Stalin blockaded West Berlin (June 1948). America and Britain airlifted 2.3 million tons of supplies over 11 months. Stalin lifted the blockade in May 1949, but Germany was now permanently divided.
Cold War crises, 1949-1962
Formation of military alliances:
- NATO (1949): North Atlantic Treaty Organisation united Western democracies in collective defence against Soviet aggression.
- Warsaw Pact (1955): Soviet response creating a military alliance of Eastern European communist states.
The Korean War (1950-1953):
Communist North Korea invaded South Korea in June 1950. UN forces (predominantly American) pushed them back. Chinese communist forces intervened, creating a stalemate near the original border. The war demonstrated that containment applied globally, not just in Europe.
The Hungarian Uprising (1956):
Hungarians demanded democratic reforms and withdrawal from the Warsaw Pact. Soviet tanks crushed the rebellion, killing 20,000. The West offered no military support, revealing the limits of 'liberation' rhetoric. Containment did not mean 'rollback' of existing communist states.
The Berlin Wall (1961):
By 1961, 3 million East Germans had fled to West Berlin. In August, Khrushchev ordered construction of a concrete barrier. The Wall became the most visible symbol of the Iron Curtain and the division of Europe. Kennedy's failure to prevent it was a propaganda defeat.
The Cuban Missile Crisis (October 1962):
The most dangerous Cold War confrontation brought the superpowers to the brink of nuclear war.
Timeline:
- October 14: U-2 spy plane photographs Soviet missile sites in Cuba
- October 22: Kennedy announces naval blockade ('quarantine') of Cuba
- October 24: Soviet ships approach blockade; some turn back
- October 27: Most dangerous day - U-2 shot down over Cuba
- October 28: Khrushchev agrees to remove missiles; Kennedy secretly agrees to remove missiles from Turkey
Consequences:
- Installation of the Moscow-Washington 'hotline' (1963)
- Nuclear Test Ban Treaty (1963) prohibiting atmospheric tests
- Both leaders showed restraint and accepted peaceful coexistence
- Khrushchev's perceived weakness contributed to his removal in 1964
The arms race and space race
Nuclear development:
- USA tested first atomic bomb (1945)
- USSR tested first atomic bomb (1949), ending American monopoly
- USA developed hydrogen bomb (1952), 1000 times more powerful
- USSR tested hydrogen bomb (1953)
- Both developed Intercontinental Ballistic Missiles (ICBMs) by late 1950s
Doctrine of Mutually Assured Destruction (MAD):
By the 1960s, both superpowers possessed enough nuclear weapons to destroy each other many times over. This paradoxically created stability, as neither side could win a nuclear war.
The space race:
- USSR launched Sputnik, first satellite (1957)
- USSR sent first man into space, Yuri Gagarin (1961)
- USA achieved first moon landing (1969)
- Competition demonstrated technological superiority and had military applications
Détente and renewed tensions, 1963-1979
Strategic Arms Limitation Talks (SALT I, 1972):
Nixon and Brezhnev agreed to limit anti-ballistic missile systems and freeze numbers of ICBMs. This represented the high point of détente.
The Helsinki Accords (1975):
Thirty-five nations recognised post-war European borders and agreed to respect human rights. Western acceptance of Soviet influence in Eastern Europe was balanced by USSR's commitment to human rights, which dissidents later exploited.
Factors promoting détente:
- Economic pressures: both superpowers needed to reduce military spending
- Vietnam War damaged American confidence and resources
- Sino-Soviet split meant USSR faced potential enemies on two fronts
- Nuclear parity made further arms build-up pointless
End of détente:
- Soviet invasion of Afghanistan (December 1979) to support communist government
- President Carter boycotted 1980 Moscow Olympics
- USA increased military spending and supported Afghan mujahideen fighters
- SALT II treaty never ratified by US Senate
The end of the Cold War, 1979-1991
Reagan's approach (1981-1989):
President Reagan adopted aggressive anti-communist rhetoric ('Evil Empire' speech, 1983) and policies:
- Massive military spending increase
- Strategic Defense Initiative (SDI/'Star Wars', 1983) - space-based missile defence system
- Support for anti-communist movements in Nicaragua, Angola and Afghanistan
- Deployment of Cruise and Pershing missiles in Europe
Gorbachev's reforms:
When Mikhail Gorbachev became Soviet leader (1985), the USSR faced economic crisis and could not compete with American military spending.
Glasnost (openness): Greater freedom of speech, press and political debate undermined Communist Party control.
Perestroika (restructuring): Economic reforms introducing limited market mechanisms, but created chaos rather than prosperity.
International consequences:
- Geneva Summit (1985): Reagan and Gorbachev met, establishing personal rapport
- Reykjavik Summit (1986): Near-agreement on eliminating nuclear weapons, blocked by SDI
- INF Treaty (1987): Eliminated intermediate-range nuclear missiles from Europe
- Gorbachev announced unilateral troop reductions (1988)
Collapse of Soviet control in Eastern Europe (1989):
Gorbachev refused to use military force to maintain communist governments. The 'Sinatra Doctrine' replaced the Brezhnev Doctrine.
- Poland: Solidarity trade union won elections (June 1989)
- Hungary: opened borders with Austria (September 1989)
- Czechoslovakia: 'Velvet Revolution' ended communist rule (November 1989)
- East Germany: Berlin Wall opened (November 9, 1989); Germany reunified (1990)
- Romania: violent overthrow and execution of Ceausescu (December 1989)
End of the USSR (1991):
- Failed hardline coup against Gorbachev (August 1991)
- Boris Yeltsin emerged as Russian leader
- Republics declared independence
- USSR formally dissolved (December 25, 1991)
The Cold War ended not through military victory but through economic exhaustion and ideological collapse of Soviet communism.
Worked examples
Example 1: Describe the key features of the Marshall Plan. [4 marks]
Model answer:
One key feature was the provision of $12.7 billion in American economic aid to rebuild war-damaged European economies between 1948 and 1952. Another feature was that sixteen Western European nations accepted the aid, while Stalin forced Eastern European countries to refuse it, deepening the division of Europe. The Marshall Plan also strengthened Western economies, making them more resistant to communist influence, which aligned with America's containment policy.
Examiner guidance: This answer identifies multiple features with supporting detail. Each feature links to the broader Cold War context. Aim for 2-3 developed features for full marks.
Example 2: Explain why the Cuban Missile Crisis occurred in 1962. [6 marks]
Model answer:
The crisis occurred partly because of Cuba's relationship with the USSR following Castro's revolution in 1959. After the failed Bay of Pigs invasion (1961), Castro feared further American attack and requested Soviet protection. Khrushchev agreed to station missiles in Cuba to deter American invasion and to balance American missiles in Turkey.
Another reason was the Cold War arms race. The USSR lagged behind America in nuclear capability, and placing missiles in Cuba would give the Soviets first-strike capability against American cities, reducing the 'missile gap'. This would strengthen Khrushchev's international position.
Finally, tensions over Berlin contributed to the crisis. The construction of the Berlin Wall in 1961 had been an embarrassment for Kennedy, and Khrushchev may have calculated that Kennedy would accept Soviet missiles in Cuba to avoid nuclear war, giving the USSR a significant victory.
Examiner guidance: For 'explain why' questions, provide multiple causes with detailed explanation. Link causes together where possible and explain how each factor contributed to the outcome. Aim for 3 developed paragraphs.
Example 3: 'The main reason for the end of the Cold War was Reagan's aggressive policies.' How far do you agree? [10 marks + 3 SPaG]
Model answer structure:
Introduction: State your argument clearly. For example: "While Reagan's policies contributed to ending the Cold War, Gorbachev's reforms and the USSR's economic weaknesses were more significant factors."
Paragraph supporting the statement: Reagan's massive military spending, particularly SDI, forced the USSR into economically ruinous competition. His support for anti-communist movements in Afghanistan and elsewhere increased Soviet costs. The deployment of missiles in Europe pressured the USSR.
Paragraphs challenging the statement: However, Gorbachev's glasnost and perestroika fundamentally undermined Soviet communism from within. Economic stagnation meant the USSR could not sustain the arms race regardless of Reagan's policies. The decision not to use force in Eastern Europe (1989) was Gorbachev's choice, not Reagan's achievement. Popular movements in Poland, Hungary and elsewhere demonstrated that communism had lost legitimacy.
Conclusion: Therefore, while Reagan's policies accelerated Soviet economic crisis, the fundamental cause was the internal failure of the communist system, exposed and exacerbated by Gorbachev's attempted reforms.
Examiner guidance: Extended writing requires balanced analysis. Examine both sides, use specific evidence, and reach a supported judgement. Maintain focus on the question throughout. SPaG marks reward accurate spelling, punctuation and grammar.
Common mistakes and how to avoid them
Confusing chronology: Learn key dates precisely. Don't place the Berlin Wall in the 1940s or mix up the order of Soviet leaders (Stalin-Khrushchev-Brezhnev-Gorbachev).
Treating the Cold War as 'hot' war: Emphasise that direct military conflict between the superpowers never occurred. Proxy wars (Korea, Vietnam, Afghanistan) involved allies or intervention, not US-Soviet combat.
Oversimplifying causation: Cold War events had multiple causes. The Cuban Missile Crisis wasn't just about missiles in Cuba—consider the Bay of Pigs, Berlin, the arms race and Khrushchev's domestic position.
Ignoring consequences: WJEC questions often ask about consequences. After describing an event, always consider its short-term and long-term effects on superpower relations.
One-sided analysis: In evaluation questions, examine both sides genuinely. Don't write three paragraphs agreeing then one weak counter-argument. Balance is essential for high marks.
Narrative without analysis: Telling the story isn't enough. Explain why events happened, what changed as a result, and how they connect to broader Cold War themes.
Exam technique for "The Cold War, 1945–1991"
Command words matter: 'Describe' requires accurate knowledge (4 marks); 'Explain why' requires causes with detailed explanation (6 marks); 'How far do you agree' requires balanced evaluation and judgement (10 marks).
Use the mark scheme structure: For 6-mark questions, aim for three developed points or two very detailed points. For 10-mark essays, write 4-5 paragraphs including introduction and conclusion.
Support every claim with evidence: Don't write "tensions increased"—explain that "tensions increased, demonstrated by the construction of the Berlin Wall in August 1961." Specific dates, names and events demonstrate knowledge.
Link to the question throughout: Begin each paragraph with explicit reference to the question. If asked about Reagan's role in ending the Cold War, start paragraphs "Reagan's policies contributed because..." or "However, factors beyond Reagan's control included..."
Quick revision summary
The Cold War (1945-1991) was an ideological conflict between capitalist USA and communist USSR. It began with Soviet expansion in Eastern Europe, prompting American containment through the Truman Doctrine and Marshall Plan. Major crises included the Berlin Blockade, Korean War, Hungarian Uprising and Cuban Missile Crisis. The arms race created nuclear stalemate (MAD). Détente in the 1970s reduced tensions temporarily before renewed confrontation over Afghanistan. Gorbachev's glasnost and perestroika, combined with economic crisis and Reagan's pressure, led to the collapse of Soviet control in Eastern Europe (1989) and the USSR's dissolution (1991).