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The Cold War: A Complete Timeline

Four decades of standoff with the Soviet Union — from the Iron Curtain to the brink of nuclear war and back.
A divided Cold War world

The Cold War never became a direct war between its two principals, and that was the whole point. For more than four decades after 1945, the United States and the Soviet Union competed for the world without firing on each other directly — through alliances, proxy wars, espionage, propaganda, a space race, and an arms buildup that put humanity minutes from annihilation. The contest shaped American foreign policy, science, and politics more than any event since World War II.

This timeline runs from the war's origins in the rubble of 1945 through the confrontations, the détente, and the final decade. Each entry links to a full account. The through-line is containment — the American strategy of holding communism in place wherever it pushed — and the enormous costs and close calls that strategy carried.

Overview
The Cold War
The forty-year ideological standoff that defined the second half of the American century.
Origins (1945–1949)
United Nations
The postwar body meant to keep the peace the Cold War would repeatedly test.
Containment
The grand strategy of holding Soviet influence in check that guided U.S. policy for decades.
Truman Doctrine
The 1947 pledge to support free peoples resisting communism, the doctrine's first statement.
Marshall Plan
The American program that rebuilt Western Europe and bound it to the West.
Berlin Airlift
The 1948–49 airlift that supplied a blockaded West Berlin and won the first Cold War showdown.
NATO
The 1949 alliance that committed the United States to the defense of Western Europe.
Confrontation (1950–1962)
Korean War
The first hot war of the Cold War, which froze the conflict into a permanent armed standoff.
McCarthyism
The domestic hunt for communists that swept up far more careers than spies.
The Domino Theory
The premise that one communist takeover would topple its neighbors, used to justify intervention.
Bay of Pigs
The CIA's failed 1961 invasion of Cuba and an early humiliation for the Kennedy administration.
Cuban Missile Crisis
The 1962 standoff over Soviet missiles in Cuba — the closest the world came to nuclear war.
The Space Race
The Space Race
The technological contest for the heavens, waged as a proxy for superpower prestige.
The Moon Landing
The 1969 landing that won the space race and answered Sputnik a decade later.
Vietnam and Détente
Vietnam War
The long, divisive war that tested containment to its breaking point.
Détente
The 1970s easing of tensions and arms control that lowered the temperature.
Iran Hostage Crisis
The 1979–81 crisis that signaled the limits of American power and ended détente's optimism.
The Final Decade
Ronald Reagan
The president whose military buildup and summitry helped bring the Cold War to a close.
Iran-Contra Affair
The 1980s scandal that exposed a covert arms-for-hostages and Contra-funding scheme.

The Cold War's hot wars get fuller treatment in the guide to every U.S. war and major conflict, and its presidents in U.S. presidents in order.

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