In an effort to reclaim land deemed stolen from Germany, Adolf Hitler set a course for European domination. In 1939, Germany invaded Poland and started WWII. Germany's invasion of Poland was carried out with the cooperation of the Soviet Union. The German Luftwaffe, or German air force, utilized a blitzkrieg. However, Germany then set its sights on the Soviet Union and invaded the country. After this action, the Soviet Union joined forces with the Allied powers. The Axis powers were Germany, Japan, and Italy. The Allied forces were the U.S., Britain, and the Soviet Union Initially the U.S. only wanted to help the Allies and was not involved in the war, so they implemented the cash and carry program, which was followed with the Lend-Lease Act. After the fall of France, Germany tried to defeat Britain with the Blitz, a heavy bombing campaign meant to weaken British forces and strength. The U.S.'s neutral stance changed after the bombing of Pearl Harbor, and the U.S. entered WWII. We concluded with a look at D-Day on June 6, 1944.