How many existing basic design types are there of the weapons the United States and the Soviet Union had an arms race over?
Nuclear arms race The nuclear arms race was a competition for supremacy in nuclear warfare between the United States, the Soviet Union, and their respective allies during the Cold War. During this period, in addition to the American and Soviet nuclear stockpiles, other countries developed nuclear weapons, though none engaged in warhead production on nearly the same scale as the two superpowers.
1968 Soviet nuclear tests The Soviet Union's 1968 nuclear test series was a group of 17 nuclear tests conducted in 1968. These tests followed the "1967 Soviet nuclear tests" series and preceded the "1969 Soviet nuclear tests" series.