In World War II the main Allied Powers were Great Britain, France, the Soviet Union,
the United States, and China. The Allies included all the wartime members
of the United Nations, the signers of the
Declaration of the United Nations. The original signers, of 1942, were
Australia, Belgium, Canada, China, Costa Rica, Cuba, Czechoslovakia, Dominican
Republic, Great Britain, Greece, Guatemala, Haiti, Honduras, India, Luxembourg,
the Netherlands, New Zealand, Nicaragua, Norway, Panama, Poland, Salvador, South
Africa, the Soviet Union, the United States, and Yugoslavia; subsequent wartime
signers were the Philippines, Mexico, Ethiopia, Iraq, Free French, and Free
Danes.
The allied powers were nations across Europe, Asia, and North America. These nations
banded together to help fight off the invasion of Hitler and his Nazi forces. They also were
bound to protect each other in a case of war.