The Allied Powers were the coalition of countries that fought against Germany and its partners (the Central Powers in World War I and the Axis powers in World War II), with Britain, France, Russia/the Soviet Union, the United States, and later China as the main core across the two world wars.

World War II Allies

In World War II, the term Allied Powers usually refers to the countries opposing the Axis (Germany, Italy, Japan). The principal Allied nations were:

  • United Kingdom.
  • Soviet Union (joined after Germany invaded in June 1941).
  • United States (joined after the Pearl Harbor attack, December 1941).
  • China (recognized as one of the major Allied partners).
  • France (especially before 1940 and then the Free French forces after occupation).

Many other states joined the Allies over time by declaring war on the Axis and signing the 1942 Declaration by United Nations, including countries from Europe, the Commonwealth, and Latin America.

World War I Allies

In World War I, the Allied Powers were those fighting the Central Powers (Germany, Austria‑Hungary, Ottoman Empire). The main Allies were:

  • British Empire (including dominions like Canada, Australia, New Zealand).
  • France.
  • Russian Empire (until 1917).
  • Italy (joined the Allies in 1915).
  • United States (entered in 1917).

Several other countries, such as Japan, Serbia, Belgium, Greece, and Romania, also fought on the Allied side during World War I.

Bottom note: Information gathered from public forums or data available on the internet and portrayed here.