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Cold War Timeline
The Cold War was a decades-long rivalry between the United States and the Soviet Union, fought through arms races, proxy wars, and the constant threat of nuclear destruction.
Put the Events in Order
The events shuffled, to number from first to last. With answer key.
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After World War II ended in 1945, the United States and the Soviet Union — once allies against Hitler — quickly became rivals. They disagreed about almost everything: democracy vs. communism, free markets vs. state control, and which system should spread across the world. The tension was called cold because the two superpowers never fought each other directly, but they came terrifyingly close during the Cuban Missile Crisis of 1962. For more than forty years, the world lived under the shadow of nuclear weapons, with both sides capable of destroying human civilization. The Cold War finally ended in 1991 when the Soviet Union collapsed under the weight of its own failures.
- 1947
The Cold War Begins
The United States and Soviet Union, wartime allies against Hitler, become rivals in a global struggle between democracy and communism.
Why it mattered: The Cold War would shape world politics for more than four decades — a constant standoff between two superpowers, each with enough nuclear weapons to destroy civilization.
- 1949
Soviet Union Tests the Atom Bomb
The Soviet Union successfully tests its first nuclear weapon, ending America's monopoly on the atomic bomb.
Why it mattered: Now both superpowers could destroy each other — the era of nuclear deterrence, and the constant threat of annihilation, had begun.
- 1950–53
The United States and its allies fight to defend South Korea from a communist North Korean invasion backed by China.
Why it mattered: Korea became the first hot war of the Cold War, showing that superpower rivalry could explode into real fighting at any time — and ending in a divided Korea that still exists today.
- 1957
Sputnik Shocks America
The Soviet Union launches the world's first artificial satellite, Sputnik, shocking Americans who feared the Soviets had pulled ahead in technology.
Why it mattered: Sputnik set off a space race and a massive US investment in science education — and ultimately led to the American moon landing.
- 1961
Berlin Wall Built
East Germany builds a concrete wall dividing Berlin overnight, trapping its citizens in the communist east.
Why it mattered: The Berlin Wall became the defining symbol of the Iron Curtain — the physical divide between free Western Europe and communist Eastern Europe.
- 1962
Cuban Missile Crisis
The US discovers Soviet nuclear missiles in Cuba; for thirteen days the world stands on the brink of nuclear war.
Why it mattered: The crisis was the most dangerous moment of the Cold War — it ended when the Soviets agreed to remove the missiles, and both sides pulled back from the edge.
- 1965–73
The US commits hundreds of thousands of troops to Vietnam to prevent a communist takeover of South Vietnam.
Why it mattered: The deeply divisive war ended in US withdrawal and communist victory, shaking American confidence and reshaping public attitudes toward military intervention.
- 1969
Moon Landing
American astronauts Neil Armstrong and Buzz Aldrin land on the Moon on July 20.
Why it mattered: The moon landing was the defining triumph of the Space Race — the United States had clearly outpaced the Soviet Union in the contest for technological prestige.
- 1979–89
Soviet War in Afghanistan
The Soviet Union invades Afghanistan and gets stuck in a brutal guerrilla war that drains its military and economy for a decade.
Why it mattered: The failed war — sometimes called the Soviet Union's Vietnam — accelerated the economic and political collapse of the USSR.
- 1991
Soviet Union Collapses
The Soviet Union officially dissolves on December 25, 1991, ending the Cold War.
Why it mattered: The peaceful collapse of the USSR ended 45 years of Cold War tension; the United States emerged as the world's sole superpower.
Cold War Quiz
Check what you learned — read on screen, or download the Quiz with Answer Key above for a worksheet version.
What two countries were the main rivals in the Cold War?
- A) The United States and the Soviet Union
- B) The Soviet Union and the United Kingdom
- C) The United States and West Germany
- D) The Soviet Union and Nazi Germany
Why was the Soviet atomic bomb test of 1949 significant?
- A) It ended World War II by forcing Japan to surrender to the Allied powers
- B) It gave the Soviet Union the world's first working atomic bomb
- C) It broke a treaty that had banned all nuclear weapons since 1945
- D) It ended America's nuclear monopoly and began an age of deterrence
What did the Berlin Wall divide?
- A) North and South Vietnam, after French rule ended
- B) East and West Berlin, a symbol of divided Europe
- C) East and West Vienna, in the capital of Austria
- D) North and South Korea, after the Korean War ended
What was the Cuban Missile Crisis?
- A) A failed US-backed invasion of Cuba at the Bay of Pigs in 1961
- B) A Soviet blockade that cut off food and fuel to Cuba
- C) A 13-day naval battle between US and Soviet ships near Cuba
- D) A 13-day standoff over Soviet nuclear missiles found in Cuba
What did the launch of Sputnik in 1957 trigger?
- A) A nuclear test ban and a joint US-Soviet space station
- B) An arms treaty and a sharp cut in US military spending
- C) A space race and a huge US investment in science education
- D) A US invasion of Cuba and a naval blockade of its ports
What happened on July 20, 1969?
- A) American troops withdrew from South Vietnam
- B) The Soviet Union launched its first satellite
- C) American astronauts landed on the Moon
- D) A Soviet cosmonaut first orbited the Earth
How did the Soviet war in Afghanistan contribute to the Cold War ending?
- A) The failed war drained Soviet resources and sped the USSR's collapse
- B) The war led China to invade the Soviet Union and split it apart
- C) The war spread into Europe and forced East Germany to open its borders
- D) The quick Soviet victory convinced the US to sign a peace treaty
When did the Cold War officially end?
- A) 1961, when the Berlin Wall was built
- B) 1991, when the Soviet Union collapsed
- C) 1973, when US troops left Vietnam
- D) 1962, when the Cuban Missile Crisis ended
Show answer key
1. A · 2. D · 3. B · 4. D · 5. C · 6. C · 7. A · 8. B
Related timelines
Space Race Timeline — The Space Race was a Cold War competition between the United States and the Soviet Union to achieve milestones in space exploration, culminating in the Apollo 11 moon landing. Open →
Vietnam War Timeline — The Vietnam War was a long and deeply divisive conflict in which the United States spent two decades trying to prevent a communist takeover of South Vietnam — and ultimately failed. Open →
How to print
Every sheet above is a ready-to-print PDF sized for US Letter paper (8.5 × 11"). The fill-in version keeps the dates and gives students lines to write each event, with the events listed at the bottom to place — good for review. The ordering activity and the quiz each end with an answer key.
Frequently asked questions
What was the Cold War?
The Cold War was a period of intense rivalry between the United States and the Soviet Union lasting from roughly 1947 to 1991. It was called cold because the two superpowers never fought each other directly, though they came dangerously close during the Cuban Missile Crisis. Instead they competed in arms races and the space program, and by supporting opposing sides in conflicts around the world.
Why did the Cold War end?
The Soviet Union collapsed in 1991 after decades of economic stagnation, military overstretch (especially in Afghanistan), and growing pressure from citizens in Soviet-controlled countries demanding freedom. Reforms introduced by Soviet leader Mikhail Gorbachev in the 1980s accelerated the process, and by December 25, 1991, the USSR had ceased to exist.
What paper size should I print this on?
The timeline is sized for standard US Letter paper (8.5 × 11 in.). The Download PDF button gives you a print-ready file that fits the page automatically.