At 0755 AM on Sunday, December 7, 1941, hundreds of Japanese fighter planes attacked the U.S. Navy Base at Pearl Harbor, Hawaii. In the attack that lasted 110 minutes, 2,386 Americans died (including 48-68 civilians – most killed by unexploded American anti-aircraft shells landing in civilian areas) and 1,139 were wounded. Eighteen ships (including five battleships) were sunk or run aground. The Japanese lost 65 men, with an additional soldier being captured.
Visit this link for an excellent overview of the attack: The Pearl Harbor Attack, 7 December 1941.