The Caribbean country that played a key role in the Missile Scare during the Cold War is Cuba. The Missile Scare, also known as the Cuban Missile Crisis, occurred in 1962 when the United States discovered Soviet missile sites being built in Cuba. This revelation led to a tense standoff between the United States and the Soviet Union, as it brought the two superpowers close to a nuclear conflict. The crisis was eventually resolved through diplomatic negotiations, with the Soviet Union agreeing to remove its missiles from Cuba, and the United States promising not to invade the island. The Cuban Missile Crisis was a significant event during the Cold War and is considered one of the closest moments the world came to a nuclear war.