The main adversaries in the Cold War were the United States and the Soviet Union, along with their respective allies. The conflict emerged after World War II as a result of ideological differences; the U.S. promoted capitalism and democratic governance, while the Soviet Union advocated for communism and authoritarian rule. This rivalry influenced global politics, leading to events such as the Korean War, the Cuban Missile Crisis, and the Vietnam War. The Cold War also involved various proxy wars and a nuclear arms race, creating a state of tension and hostility that persisted for several decades, impacting international relations and strategies worldwide.