Next week marks 55 years since the Soviet-led Warsaw Pact invasion of Czechoslovakia, which took place on the night of Aug. 20–21, 1968, when tanks crossed the Czechoslovak border without warning. Test your knowledge of the momentous events that preceded, revolved around, and followed the invasion with our quiz.
Question 1 / 10
What was the main reason behind the Warsaw Pact invasion of Czechoslovakia in 1968?
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Czechoslovakia's aggressive military actions
Economic instability in the region
Fear of spreading political reforms
Violation of international treaties
Question 2 / 10
Which country led the Warsaw Pact invasion of Czechoslovakia?
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Poland
East Germany
Soviet Union
Hungary
Question 3 / 10
What was the code name for the military operation that marked the invasion of Czechoslovakia?
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Operation Danube
Operation Iron Curtain
Operation Prague Spring
Operation Red Star
Question 4 / 10
Who was the Czechoslovak leader at the time of the invasion?