The Cuban Missile Crisis was a 13-day confrontation in October 1962 between the Soviet Union and Cuba on one side and the United States on the other side. It was one of the major confrontations of the Cold War, and is generally regarded as the moment in which the Cold War came closest to turning into a nuclear conflict. It is also the first documented instance of the threat of mutual assured destruction (MAD) being discussed as a determining factor in a major international arms agreement.
Sebastian Shaw started the Cuban Missile Crisis by placing the missiles from Turkey to Cuba. Along with his Hellfire Club; Shaw planned on using the crisis to have humanity kill each other leaving the world habitable for only mutants. However, he was stopped by another group of mutants known as the X-Men which had been formed by Charles Xavier and Erik Lehnsherr the latter of whom was experimented on by Shaw during World War ll. While the crisis was averted and humanity saved the governmented at this point began to learn about the existence of Mutants.