World War II took place all over the world, including East Asia, Europe and the islands in the Pacific Ocean. Some fighting was seen as far away as the Aleutian Islands, Madagascar and South America.
The major powers during World War II were the Allies, which consisted of the United Kingdom and the United States, and the Axis, which consisted of Japan and Germany. Russia held both positions during the war. Russia's leader, Joseph Stalin, eventually teamed up with the Allies to fight the Japanese, but attacked Poland with Germany. However, when Germany turned on Russia by invading the country, Stalin teamed up with the Allies once again.
The U.S. didn't want anything to do with the war. The country tried to remain neutral, but when the Japanese attacked Pearl Harbor in December 1941, the country found itself thrust into a war it didn't want. Once the U.S. declared war on Japan, it wasn't long before it was involved in the war with Germany. With the exception of the attack on Pearl Harbor, no fighting took place in the U.S. or Canada, although both countries sent troops to aid in the war efforts everywhere else. Fighting spanned the globe but didn't go as far as to affect Australia, New Zealand, the U.S. or Canada.