The main countries in the Allied powers of World War I were France, the British Empire and the Russian Empire. The main Allied powers of World War II were France, Great Britain, the United States, China and the Soviet Union.
In World War I, the Allied powers represented the countries fighting against the Central powers of Germany, Turkey and Austria-Hungary. As well as the main countries of the Allied powers, many other countries were part of the Allies from signing a treaty with the main countries. By the end of the war, when the Treaty of Versailles was signed, 27 countries were listed as part of the Allied Powers.