After WW2, the Soviet Union developed nuclear weapons and by 1953, both sides had developed nuclear bombs. Both sides knew how powerful the bombs were but they both wanted to come out on top. It soon turned into a race to see who could match the other side’s new weapons. No one wanted a nuclear war, so in 1969, The US and the Soviet Union began the SALT. This was made to limit the number of nuclear weapons each side could hold. And by 1979, each side agreed.