Why is the Cuban missile crisis in it?

From the end of April 1962, Khrushchev gradually formed the idea of setting up medium-range missiles equipped with nuclear warheads in Cuba. There are of course many reasons: to prevent the United States from invading Cuba again and reduce the influence of the United States in third world countries. If Washington puts pressure on Cuba, it must make concessions on the Berlin issue. America's overwhelming nuclear superiority can be reduced by this erection. At that time, Soviet nuclear bombs used 1: 17 (about 300 to 5000), long-range bombers used 1:8( 155 to 1300), and intercontinental missiles used 1:5(44 to). Khrushchev will set up a medium-range missile in Cuba as an answer to the missiles set up by the United States in Turkey, Italy and Britain a few years ago-the United States must accept such a balance. Khrushchev's consideration was later proved to be wishful wrong judgment. This stimulated the internal motivation of both sides and led to the climax of the Cold War. 1962 In early May, Moscow decided to recommend Castro to set up medium-range missiles in Cuba. Alekseev, the new Soviet ambassador to Havana, later recalled that Khrushchev asked him if Castro would agree to this proposal. If you don't agree, then there is no other way to stop the American invasion. If it agrees, Americans will pay a higher price for landing in Cuba again, and the threat faced by this Caribbean island country will be equal to the threat it gives to the United States. All this depends on the medium-range missiles set up by the Soviet Union in Cuba.