The Soviet Union countered with the Warsaw Pact in 1955, which had similar results with the Eastern Bloc. The United States and its Western European allies sought to strengthen their bonds and used the policy of containment against Soviet influence they accomplished this most notably through the formation of NATO, which was essentially a defensive agreement in 1949. The first phase of the Cold War began shortly after the end of World War II in 1945.

As nearly all the colonial states underwent decolonization and achieved independence in the period from 1945 to 1960, many became Third World battlefields in the Cold War. United States involvement in regime change during the Cold War included support for anti-communist and right-wing dictatorships, governments, and uprisings across the world, while Soviet involvement in regime change included the funding left-wing parties, wars of national liberation and revolutions around the world.

The Soviet Union had a command economy and installed similarly Communist regimes in its satellite states. The Eastern Bloc was led by the Soviet Union and its Communist Party, which had an influence across the Second World and was also tied to a network of authoritarian states. The Western Bloc was led by the United States, as well as a number of other First World nations that were generally liberal democratic but tied to a network of often authoritarian, Third World states, most of which were the European powers' former colonies. Aside from the nuclear arms race and conventional military deployment, the struggle for dominance was expressed via indirect means, such as psychological warfare, propaganda campaigns, espionage, far-reaching embargoes, sports diplomacy, and technological competitions like the Space Race. The conflict was based on the ideological and geopolitical struggle for global influence by these two superpowers, following their roles as the Allies of World War II that led to victory against Nazi Germany and Imperial Japan in 1945. The term cold war is used because there was no large-scale fighting directly between the two superpowers, but they each supported opposing sides in major regional conflicts known as proxy wars.

The Cold War was a period of geopolitical tension between the United States and the Soviet Union and their respective allies, the Western Bloc and the Eastern Bloc.

Instaling Iron Order 1919