The Cuban Missile Crisis in 1962 had significant geopolitical consequences, marking a high point in Cold War tensions between the United States and the Soviet Union. The installation of Soviet nuclear missiles in Cuba led to a 13-day standoff that brought the world to the brink of nuclear war. The successful resolution of the crisis, which involved diplomatic negotiations and a U.S. promise not to invade Cuba, resulted in a direct communication line between Washington and Moscow to prevent future incidents. The crisis shifted U.S. foreign policy towards a strategy of containment and led to arms control agreements, such as the Nuclear Test Ban Treaty of 1963.