The attack on Pearl Harbor was a surprise military attack that was between the Japanese and United States. The United States was surprised attacked by Japanese at their naval base in Hawaii on December 7, 1941. The Japanese did this because they were taking over islands near Hawaii and they were moving closer to Hawaii. The U.S. were nearly completely helpless and they couldn't do much. The Japanese did this so they could cripple the U.S. Pacific Fleet and prevent the U.S. from interfering in Japanese conquest. The Japanese thought that they critically damaged the U.S. however the U.S. fleets still overpowered the Japanese fleets. The Japanese ended up having a successful win during this battle.