After the Second World War, the United States, Soviet Union, United Kingdom, China, France, and India participated in a race to develop and acquire nuclear weapons, known as the
"nuclear arms race."
This was a period of intense competition between the superpowers, as each country sought to build up its nuclear arsenal in order to deter the others from attacking.
The nuclear arms race led to a dramatic increase in the number of nuclear weapons in the world, as well as a growing fear of a nuclear war that could destroy the entire planet. It also had a significant impact on international relations, as countries sought to form alliances and engage in diplomacy in order to prevent nuclear conflict. The race finally came to an end with the signing of several arms control treaties, such as the Strategic Arms Limitation Talks (SALT) and the Anti-Ballistic Missile (ABM) Treaty, which helped to reduce tensions and limit the spread of nuclear weapons.