Which crisis was the most severe of the Cold War?

Question

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The Cuban Missile Crisis was the most severe crisis of the Cold War because it brought the world dangerously close to nuclear war. The Soviet Union had stationed nuclear missiles in Cuba, which the U.S. saw as a direct threat to its national security. The U.S. responded with a naval quarantine of Cuba, and tensions escalated as both sides prepared for a possible military conflict. However, through diplomatic efforts and backchannel negotiations, both sides eventually reached a peaceful agreement, avoiding a catastrophic nuclear war.

Which Crisis Was the Most Severe of the Cold War