Help me about history

The arms race during the Cold War was primarily a competition between the United States and the Soviet Union to achieve military superiority, particularly in nuclear weapons. The United States is generally considered to have "won" the arms race, as the immense economic strain of keeping pace with American military spending significantly contributed to the eventual collapse of the Soviet Union. Both superpowers engaged in a massive build-up of nuclear arsenals and conventional forces, driven by mutual suspicion and the doctrine of Mutually Assured Destruction (MAD), which aimed to deter attack by ensuring devastating retaliation.