What did the United States and Soviet Union both do during the arms race

Between 1945, when the United States dropped two atomic bombs on Japan to end World War II, and 1972, when the first comprehensive nuclear arms reduction treaty between the United States and the Soviet Union was signed, both nations engaged in a race to build and deploy as many nuclear weapons as possible.

Explanation:

idk

the ones that are losing there jobs

answer; the period of time known as the middle ages;