Japan's bombing of Pearl Harbor was the major event that caused the United States to enter World War II. On December 7, 1941, Japan bombed the harbor, which damaged 300 planes, eight battleships, and killed over 2,000 people. Learn more about the attack.
This World War II timeline highlights important dates during January 1931 to August 1939. This time period saw Japan and Italy break away from the League of Nations and the rise of the Nazi Party in Germany. Follow the events of World War II. See more »
Japan's bombing of Pearl Harbor was the major event that caused the United States to enter World War II. On December 7, 1941, Japan bombed the harbor, which damaged 300 planes, eight battleships, and killed over 2,000 people. Learn more about the attack. See more »
War Begins. In the early hours of Friday, September 1, 1939, the German armies stormed across the Polish frontierwithout a declaration of war. See more »
This World War II timeline highlights important dates from September 1939 to April 1940. This time period saw the official start to World War II on September 1, 1939 when Germany invaded Poland. Follow the events of World War II and the German invasion. See more »
World War II was the most widespread and deadly war in history. It was a total war, raining as much destruction on civilians as on armed forces. See more »
