Why did the Cold War alternate between crisis and detente?
Analyse the high-tension period of the Cold War (Berlin 1961, Cuba 1962) and the subsequent move to detente (SALT 1972, Helsinki Accords 1975)
A focused answer to the VCE Modern History Unit 2 key knowledge point on the Cuban Missile Crisis and detente. The Berlin Wall (August 1961), Bay of Pigs (April 1961), Cuban Missile Crisis (October 1962), the establishment of the hotline (1963), partial test ban treaty (1963), Vietnam-era pressures, and detente under Nixon-Brezhnev (SALT I 1972, Helsinki Accords 1975).
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What this dot point is asking
VCAA wants you to analyse the high-tension Cold War crises of the early 1960s, the brink-of-war moment in October 1962, and the move to detente from the late 1960s.
Berlin Wall (August 1961)
By 1961, million East Germans had fled to West Berlin (a quarter of East Germany's population). Khrushchev pressured the West to recognise East Germany.
Construction. Night of 12-13 August 1961. Initially barbed wire, then concrete. The Wall stopped the haemorrhage of East German labour. Kennedy: "It is not a very nice solution, but a wall is a hell of a lot better than a war."
Bay of Pigs (April 1961)
US-backed Cuban exile invasion of Cuba failed. Castro's regime consolidated. Castro publicly declared himself a Marxist-Leninist (December 1961).
Cuban Missile Crisis (October 1962)
- Soviet missiles deployed
- Khrushchev placed medium- and intermediate-range nuclear missiles in Cuba; ostensibly to defend Cuba and to balance US Jupiter missiles in Turkey.
- US discovery
- U-2 reconnaissance photographs (14 October 1962). Kennedy convened ExComm.
- Quarantine
- Kennedy announced naval blockade (22 October 1962). Soviet ships turned back; tense standoff for six days.
- Brink moment (27 October 1962)
- Soviet submarine B-59 in the quarantine zone was depth-charged; senior officer Valentin Savitsky authorised a nuclear torpedo strike, vetoed by Vasily Arkhipov. US U-2 shot down over Cuba; pilot Rudolf Anderson killed.
- Resolution
- Kennedy publicly accepted Khrushchev's first letter (Soviet withdrawal in exchange for US non-invasion pledge). Secretly conceded removal of Jupiter missiles from Turkey. Khrushchev agreed 28 October.
Aftermath
Moscow-Washington hotline (June 1963). Direct teleprinter link between the Kremlin and the White House.
Partial Test Ban Treaty (August 1963). Banned atmospheric and underwater nuclear tests; not underground.
Sino-Soviet split. Khrushchev's compromise was condemned by Mao as betrayal; deepened the ideological rift.
Khrushchev's fall (October 1964). Replaced by Brezhnev (until 1982).
Detente (1969-1979)
Causes. Soviet strategic parity with US (achieved by late 1960s). US bogged down in Vietnam. China's split from USSR offered US opening. European Ostpolitik (West German Chancellor Willy Brandt).
Strategic Arms Limitation Treaty (SALT I, 1972). Caps on intercontinental ballistic missiles and submarine-launched missiles. Anti-Ballistic Missile (ABM) Treaty same year.
Nixon's visit to China (February 1972). Diplomatic rapprochement with PRC; tightened pressure on the USSR.
Helsinki Accords (1 August 1975). -nation conference. Recognised post-war European borders (Soviet gain); included human rights provisions (Basket III) that became a tool for Eastern European dissent.
SALT II (June 1979). Strategic arms limit treaty. Never ratified by US Senate after Soviet invasion of Afghanistan (December 1979).
End of detente (late 1970s - early 1980s)
Soviet invasion of Afghanistan (December 1979). US grain embargo, Olympics boycott. Reagan's "evil empire" rhetoric (1983). Detente formally over by the early 1980s; replaced by the "Second Cold War" until Gorbachev (1985).
In one sentence
The Cuban Missile Crisis (16-28 October 1962) brought the world to the brink of nuclear war, ending with Khrushchev's withdrawal of Cuban missiles in exchange for US guarantees and the secret removal of US Jupiter missiles from Turkey; the crisis produced institutional safeguards (hotline 1963, Partial Test Ban Treaty 1963) and ultimately a decade of detente (SALT I 1972, Helsinki Accords 1975) that ended with the Soviet invasion of Afghanistan (1979).
Examples in context
Example 1. The B-59 submarine episode (27 October 1962) as a worked illustration of how close the crisis came to war. Read the moment as a case study in the role of contingency. In the quarantine zone, the depth-charged submarine B-59 was out of contact with Moscow; senior officer Valentin Savitsky authorised a nuclear torpedo strike, vetoed by Vasily Arkhipov, on the same day a U-2 was shot down over Cuba. The example shows the dot point's high-tension theme concretely: nuclear war turned on individual decisions at the edge of communication and control.
Example 2. The Helsinki Accords (1975) as a study in detente's double edge. Read the -nation agreement as an illustration of how detente served both sides. It recognised post-war European borders, a Soviet gain, while the human rights provisions (Basket III) became a tool for Eastern European dissent. Reframed as a worked example, Helsinki shows the dot point's point that detente was not simple friendship but a managed bargain whose terms could later cut against the Soviet bloc.
Try this
Q1. "The Cuban Missile Crisis was resolved by compromise rather than by American firmness." To what extent do you agree? [10 marks]
- Cue. Thesis: both mattered, but the secret Jupiter deal shows compromise was central. Evidence: the public quarantine and non-invasion pledge; the secret removal of Jupiters from Turkey; Khrushchev's agreement on 28 October.
Q2. Explain the causes of detente in the late 1960s and 1970s. [6 marks]
- Cue. Soviet strategic parity by the late 1960s; the US bogged down in Vietnam; the Sino-Soviet split offering a US opening; Brandt's Ostpolitik; institutionalised through SALT I (1972) and the ABM Treaty.
Q3. Analyse why detente broke down by the early 1980s. [4 marks]
- Cue. The Soviet invasion of Afghanistan (December 1979) ended SALT II ratification; US grain embargo and Olympics boycott; Reagan's "evil empire" rhetoric (1983) opened a "Second Cold War".
Exam-style practice questions
Practice questions written in the style of VCAA exam questions on this dot point, with worked answer explainers. The year tag is the paper they imitate, not the source.
Year 11 SACHow close did the Cuban Missile Crisis bring the world to nuclear war?Show worked answer →
A Year 11 response.
- Thesis
- The Cuban Missile Crisis (16-28 October 1962) brought the world the closest it has come to nuclear war: Soviet nuclear missiles in Cuba could have struck US cities in minutes, the US naval quarantine risked confrontation with Soviet ships and submarines (one of which, B-59, was nearly authorised to fire a nuclear torpedo), and Kennedy's ExComm was divided between negotiation and military strike.
- Body 1: The trigger
- US U-2 photographed Soviet missile sites in Cuba on 14 October 1962. Kennedy convened ExComm.
- Body 2: The crisis
- US naval quarantine (announced 22 October). Soviet submarine B-59 (27 October), depth-charged by US destroyers and unable to communicate with Moscow, came within one vote of launching a nuclear torpedo (Vasily Arkhipov's veto prevented it). U-2 shot down over Cuba same day. Khrushchev's letter offering missile withdrawal arrived (26 October), then second letter demanding US Jupiter removal from Turkey (27 October).
- Body 3: Resolution
- Kennedy accepted the first letter publicly; secretly conceded the Jupiters in Turkey. Khrushchev agreed (28 October) to withdraw the Cuban missiles. Crisis ended without direct combat.
- Conclusion
- Multiple historians (Robert McNamara, Sergei Khrushchev) have judged the crisis the closest call. The hotline (1963), Partial Test Ban Treaty (1963) and subsequent arms-control culture all responded to the trauma.
Markers reward the dated chronology, the B-59 detail, the secret Jupiter deal, and the lasting institutional response.
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