The Anti-Ballistic Missile Treaty, commonly known as the ABM Treaty, was a 1972 agreement between the United States and the Soviet Union that limited the deployment of missile defense systems. This treaty aimed to reduce the threat of nuclear war by capping the development and deployment of anti-ballistic missile systems, thus encouraging a balance of power through mutual deterrence. It was a key component in the Cold War arms control framework, especially during the height of tensions surrounding events like the Bay of Pigs invasion and the Cuban Missile Crisis.