The Formosa Air Battle (Japanese: 台湾沖航空戦, Chinese: 臺灣空戰) took place between October 10 and 20, 1944, off the eastern coasts of the Ryukyu Islands, Formosa, and Luzon. It was fought by the Imperial Japanese Navy Air Service and the approaching Task Force 38 of the United States Third Fleet and was one of a series of air raids on Japan during the Pacific War. The attacks served to prevent Japanese aircraft from participating in the Battle of Leyte Gulf later that month.