Nuclear Proliferation: Nuclear proliferation refers to the spread and increase in the number of countries possessing nuclear weapons. It often contributes to arms races between nations.
Deterrence: Deterrence is a strategy used by countries where they develop strong military capabilities as a means of discouraging potential adversaries from attacking them.
Cold War: The Cold War was an era of political tension and rivalry between the United States and Soviet Union after World War II. The arms race between these two superpowers was a significant aspect of the Cold War.