Naval Station Pearl Harbor is a U.S. naval base adjacent to Honolulu, in the U.S. state of Hawaii. In 2010, along with the United States Air Force's Hickam Air Force Base, the facility was merged to form Joint Base Pearl Harbor–Hickam.
Pearl Harbor is the headquarters of the United States Pacific Fleet. The attack on Pearl Harbor by the Empire of Japan on Sunday, 7 December 1941 brought the United States into World War II.