Pearl Harbor is located in Hawaii on the island of O'ahu in the Pacific Ocean between California and Japan.
The Japanese thought that if they took out the war ships in Pearl Harbor, then the United States Navy would never attack. However, they were mistaken since the US declared war the next day.
WE DECLARE WAR!
The attack on Pearl Harbor had hundreds of Japanese fighter planes and bombers that flew to Pearl Harbor and attacked. The bombers dropped bombs and torpedoes on the war ships, while the fighter planes attacked the US fighter planes.