On Sunday, December 7th, 1941 the Japanese launched a
Surprise attack against the U.S. Forces stationed at Pearl Harbor,
Hawaii . By planning his attack on a Sunday, the Japanese commander
Admiral Nagumo, hoped to catch the entire fleet in port. As luck
Would have it, the Aircraft Carriers and one of the Battleships
Were not in port. (The USS Enterprise was returning from Wake
Island , where it had just delivered some aircraft. The USS
Lexingtonwas ferrying aircraft to Midway, and the USS Saratoga and
USS Colorado were undergoing repairs in the United States).
In spite of the latest intelligence reports about the missing
Aircraft carriers (his most important targets), Admiral Nagumo
Decided to continue the attack with his force of six carriers and
423 aircraft. At a range of 230 miles north of Oahu , he launched
The first wave of a two-wave attack. Beginning at 0600 hours his
First wave consisted of 183 fighters and torpedo bombers which
Struck at the fleet in Pearl HarborLY: Arial"> and the airfields in Hickam,
Kaneohe and Ewa. The second strike, launched at 0715 hours,
consisted of 167 aircraft, which again struck at the same targets.
At 0753 hours the first wave consisting of 40 Nakajima B5N2
Kate" torpedo bombers, 51 Aichi D3A1 "Val" dive bombers, 50 high
Altitude bombers and 43 Zeros struck airfields and Pearl Harbor
Within the next hour, the second wave arrived and continued the
attack.
http://en.wikipedia.org/wiki/Attack_on_Pearl_Harbor