during ww2 which countries were part of the allied powers
The major Allied Powers were Britain, France, Russia, and the United States. The Allies formed mostly as a defense against the attacks of the Axis Powers. The original members of the Allies included Great Britain, France and Poland. When Germany invaded Poland, Great Britain and France declared war on Germany. Poland-It was the invasion of Poland by Germany in 1939 that started World War II. 2  China-China was invaded by Japan in 1937. 3  They became a member of the Allies after the attack on Pearl Harbor in 1941. 4  Great Britain, Russia, and the United States were sometimes called the Big Three.