Pearl Harbor was originally an extensive, shallow embayment called Wai Momi (meaning “harbor of pearl”). Much of the harbor and surrounding lands is a United States Navy deep-water naval base. It is also the headquarters of the U.S. Pacific Fleet.
The attack on Pearl Harbor was a surprise military strike conducted by the Japanese navy against the United States’ naval base at Pearl Harbor, Hawaii, on the morning of Sunday, December 7, 1941, later resulting in the United States becoming militarily involved in World War II. It was intended as a preventiveaction to keep the U.S. Pacific Fleet from influencing the war Japan was planning to wage in Southeast Asia against Britain, the Netherlands, and the United States. The attack consisted of two aerial attack waves totaling 353 aircraft, launched from six Japanese aircraft carriers. (Source: Wikipedia)
US casualties: 4 battleships sunk; 4 battleships damaged including 1 run aground; 2 destroyers sunk, 1 damaged; 1 other ship sunk, 3 damaged; 3 cruisers damaged; 188 aircraft destroyed, 155 aircraft damaged; 2,345 military and 57 civilians killed; 1,247 military and 35 civilians wounded.