Pearl Harbour, where the American Pacific Fleet was stationed, was attacked by Japanese in

Pearl Harbor, naval base and headquarters of the U.S. Pacific Fleet, Honolulu county, southern Oahu Island, Hawaii, U.S. in U.S. history the name recalls the surprise Japanese air attack on December 7, 1941, that temporarily crippled the U.S. Fleet and resulted in the United States' entry into World War II.