This teacher resource guide introduces readers to the events in the Pacific theater during the World War II. After the invasion of Manchuria and its withdrawal from the League of Nations, Japan was further isolated from the international community. Japan entered the WWII on the side of the Nazi Germany, while continuing to expand its empire in Asia. In this guide, we cover a variety of key events that shaped the direction and progress of the war in the Asia Pacific, including the Marco Polo Bridge Incident, the Rape of Nanjing, Pearl Harbor, the Yalta Conference, and the bombing of Hiroshima and Nagasaki.