Cold war was fought between the two groups of countries with different political ideologies and political regimes occurred in the period after World War II. One is called Eastern Bloc, the Soviet Union, which was ruled by the Communist regime, the other one is U.S. and allies called the Western camp, which was ruled by liberal democracy. During that time, both sides in the arms race, space technology, espionage, economic and war through proxy wars. Cold War as the one that powers the two parties competes by trying to build a military force to intimidate their opponents. The foreign powers are not at war with each other directly, but to encourage their allies to the war instead also known as a Proxy War. They called Cold War because of the struggle between the superpowers using psychology does not lead to direct military combat like Hot War.