On September 1, 1939, World War II began when Germany invaded Poland. Just as it had during the outbreak of World War I, the United States managed to keep itself out of the conflict with the war taking place in Europe, Africa, and Asia. However, due to American economic embargo of Japan, the Japanese seeking conquest in the Pacific, were forced to attack America in the hope that it would end the embargo and allow them to gather the resources necessary for conquest. On December 7, 1941 at 7:48 AM, Japanese bombers attacked the American naval base at Pearl Harbor, Hawaii. During the attack, eight battleships and three cruisers were sunk and further 188 aircraft were destroyed. This attack led to the American entrance into World War II on December 8th when Congress declared war on both Japan and Germany. Harnessing the incredible manufacturing power that America had built during the Great Depression, America systematically set out to out-build and overpower its enemies. During the course of the war, America demonstrated that modern warfare was about three basic things: amount of materiel (arms and other weapons) available, the communication between commanders and soldiers, and the speed of an army’s advance. These ideas dispelled the historical view of warfare that said that advanced technology and highly soldiers always won a war. And so, despite Germany’s technological advantage and superior training, the United States defeated it.