
It was instead characterized by espionage, political subversion and proxy wars. Once allies during World War II, the United States and the Soviet Union became competitors on the world stage and engaged in the Cold War, so called because it never resulted in overt, declared total war between the two powers. The war's aftermath was also defined by the rising threat of nuclear warfare, the creation and implementation of the United Nations as an intergovernmental organization, and the decolonization of Asia and Africa by European and east Asian powers, most notably by the United Kingdom, France, and Japan.


Two global superpowers, the Soviet Union (USSR) and the United States (US), rose in the aftermath of World War II.
