The conflict between the United States and the Soviet Union that nearly resulted in a war was:
a. the Cuban Missile Crisis
During the Cuban Missile Crisis in October 1962, the U.S. discovered that the Soviet Union was placing nuclear missiles in Cuba. This discovery led to a tense standoff between the two superpowers, with the U.S. demanding the removal of the missiles and implementing a naval blockade around Cuba to prevent further missile shipments. The situation escalated to the brink of nuclear war, with both countries on high alert. Fortunately, through intense negotiations, a peaceful resolution was reached, with the Soviets agreeing to remove the missiles from Cuba in exchange for the U.S. pledging not to invade the island. The Cuban Missile Crisis is considered one of the closest moments the world has come to a nuclear war during the Cold War.