By December of 1941 all three of the major Axis powers – Germany, Japan, and Italy – were in the war and dominated large parts of Europe, Africa, East and Southeast Asia, and the Pacific Ocean. The USSR entered the war on the Allied side when it was attacked by Germany in June of 1941.Italy
Siding with Germany and hoping for large territorial acquisitions in North Africa, Italy entered the war in June of 1940.USSR
Despite the Molotov-Ribbentrop Pact, in June of 1941 Germany attacked the USSR. Dogged Soviet resistance and brutal winter conditions resulted in heavy casualties on both sides.Japan
Japan’s attack on Pearl Harbor on 7 December 1941 brought the United States into the war and turned a largely European war into a truly global conflict.