About the allieD powerS
The Allies powers consisted of Great Britain, France, Russia, Australia, China, and the U.S. After the U.S got attack by Japan, they decided to fight in WWII.
The four countries flags above are the four main countries that help the U.S during the war. (Besides the U.S) Are Great Britian, URSS, (Russia at the time) and France.
the other two flags you may not recognize are Australia, and Canada. They used these flags during the war on their sleeves like when the Natzi symbol is on their sleeve too (German Axis power)