The bombing of Pearl Harbor occurred on December 7, 1941. The first Japanese dive-bomber appeared over Pearl Harbor at 7:55 a.m. local time, and the attack lasted about 75 minutes. It involved two waves of nearly 200 aircraft each, including torpedo planes, bombers, and fighters, targeting airfields and battleships in the harbor. The attack resulted in more than 2,400 American military and civilian deaths, and significant damage to the U.S. Pacific Fleet. This event marked the entry of the United States into World War II.