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Cuban Missile Crisis
October 16–28, 1962· Event· Americas
Well documentedSolid records, physical evidence or scientific consensus.
A 13-day standoff after the US found Soviet nuclear missiles in Cuba, the closest the world has come to nuclear war.
See it on the Battles & Wars map →What happened
In 1962 Soviet leader Nikita Khrushchev secretly placed nuclear missiles in Cuba, about 145 km (90 miles) from Florida. A US U-2 spy plane photographed the sites on October 14. President John F. Kennedy announced a naval 'quarantine' on October 22 rather than air strikes. After tense days, including a U-2 shot down over Cuba, Khrushchev agreed on October 28 to remove the missiles in return for a US no-invasion pledge and a secret promise to pull US missiles from Turkey.
Why it matters
It scared both sides into caution: a Moscow–Washington hotline was set up in 1963 and the Limited Test Ban Treaty followed that year.
How we know
Declassified White House tapes of Kennedy's meetings, Soviet and Cuban documents, U-2 photographs, and later conferences where participants from all three countries compared notes.
Still debated
How close it really came is debated; Soviet submarine officer Vasili Arkhipov reportedly refused to approve a nuclear torpedo launch on October 27.
Connections (4)
▸Cuban Missile Crisis was the sternest test of Nuclear weapons and deterrenceWell documented
The connection
The crisis tested deterrence at its edge. Khrushchev placed missiles in Cuba partly to offset US nuclear superiority, and both sides faced a real prospect of nuclear war. Each backed off rather than risk it. Afterward they built safeguards: a hotline, the 1963 Limited Test Ban Treaty and, later, arms-control talks.
When and how
Washington, Moscow and Cuba, October 1962, among Kennedy's advisers (the ExComm), Khrushchev's leadership in the Kremlin and Fidel Castro's government.
How we know
Declassified ExComm tapes and Soviet records show both leaders feared escalation; the treaties that followed are documented.
Debates and open questions
Whether deterrence worked or the world escaped by luck, given misunderstandings such as the nuclear-armed Soviet submarines, is debated.
▸Cuban Missile Crisis was the most dangerous moment of Cold WarWell documented
The connection
For thirteen days the Cold War came closest to nuclear war. Its peaceful end changed the relationship: both sides grew more careful about direct confrontation, opening a gradual thaw. Yet the Soviet Union also resolved never again to be outgunned and built up its missiles, fueling the arms race.
When and how
October 1962; Khrushchev's loss of standing contributed to his removal in 1964, and the Soviet missile buildup continued through the 1970s.
How we know
Leaders' memoirs, declassified records, and the treaties and arms buildup that followed are well documented.
Debates and open questions
How much the crisis caused later détente, and whether the secret Turkey deal made it a draw rather than a US win, is debated.
▸Intercontinental ballistic missile (ICBM) was scarce for Moscow, a motive behind the Cuban Missile CrisisMostly agreed
The connection
In 1962 the Soviet Union had a few dozen ICBMs at most, against hundreds of US long-range missiles and bombers. Placing cheaper medium-range missiles in Cuba, within reach of much of the US, was a quick way to narrow that gap, alongside defending Castro and answering US missiles in Turkey.
When and how
Moscow, May 1962, when Khrushchev made the decision; missiles were shipped secretly to Cuba that summer and autumn.
How sure are we?
Soviet documents and participants' accounts released after 1991, and US estimates of Soviet missile numbers, support this motive.
Debates and open questions
Historians weigh Khrushchev's motives differently: closing the missile gap, protecting Cuba from invasion, or gaining leverage over US missiles in Turkey.
▸U-2 spy plane photographed the missiles that triggered the Cuban Missile CrisisWell documented
The connection
On October 14, 1962, a U-2 flown by Major Richard Heyser photographed Soviet medium-range missile sites at San Cristóbal in western Cuba. Analysts identified them by comparing them with earlier photos of Soviet sites. Shown to President Kennedy on October 16, the photos began the 13-day crisis; on October 27 a U-2 was shot down over Cuba.
When and how
Western Cuba, October 14, 1962; analysis at the National Photographic Interpretation Center in Washington; U-2 pilot Major Rudolf Anderson was killed October 27.
How we know
The original photographs are declassified and public, and Kennedy's taped White House meetings record his reaction.
Debates and open questions
Why US intelligence missed the buildup for weeks, partly because overflights of Cuba had been restricted that September, is still examined.