The document provides a detailed timeline of key events during World War 2 from 1939 to 1945. It describes how Germany and the Soviet Union invaded Poland in 1939, marking the start of WWII. It then outlines the major military campaigns and battles between the Axis and Allied powers over the following years, including Germany's invasions of Western Europe in 1940, the start of the Holocaust, Germany's invasion of the Soviet Union in 1941, and the US entry into the war after the attack on Pearl Harbor. Finally, it summarizes the Allied invasions of Western Europe and Germany in 1944-1945, Hitler's suicide, and Japan's surrender after the atomic bombings of Hiroshima and Nagasaki, bringing the war to an