How were nuclear weapons related to the cold war?
The Cold War was the period of conflict, tension and competition between the United States and the Soviet Union and their respective allies from the mid-1940s until the early 1990s. Throughout the period, the rivalry between the two superpowers was played out in multiple arenas: military coalitions; ideology, psychology, and espionage; military, industrial, and technological developments, including the space race; costly defence spending; a massive conventional and nuclear arms race; and many proxy wars. There was never a direct military engagement between the US and the Soviet Union, but there was half a century of military buildup as well as political battles for support around the world, including significant involvement of allied and satellite nations in proxy wars. Although the US and the Soviet Union had been allied against Nazi Germany, the two sides differed on how to reconstruct the postwar world even before the end of World War II. Over the following decades, the Cold War spr