Originally laid down on 20 July 1920 as a battleship, Kaga was launched as an aircraft carrier on 17 November 1921 as a result of the agreement reached at the Washington Naval Conference. The result was a flat-top, a ship with no superstructure above the flight deck and the funnels in the form of two long pipes or trunks venting outwards towards the stern. She had a displacement of 28,100 tons, a length of 715 feet and a beam of 102 feet. She carried 10 8-inch, four 4.7-inch and 12 4.7-inch anti-aircraft guns. She could carry 60 aircraft. At Pearl Harbor the formations she flew were, in the First Attack Wave, the 2nd Attack Unit, 2nd Torpedo Attack Unit and the 2nd Fighter Combat Unit, and in the Second Attack Wave the 12th Attack Unit and 2nd Fighter Attack Unit. Kaga, with Akagi and Soryu, was caught by SBD2 Dauntless dive-bombers from Enterprise and Yorktown in the Battle of Midway (Midway, Battle of) on 5 June 1942 and sunk.
See also: 2nd Attack Unit; 2nd Torpedo Attack Unit 2nd Fighter Combat Unit; 12th Attack Unit; Akagi; Enterprise; First Attack Wave; Midway, Battle of; Pearl Harbor; SBD2; Second Attack Wave; Soryu; Yorktown