The Fifteenth Air Force (15 AF) is a numbered air force of the United States Air Force's Air Combat Command (ACC). It is headquartered at Shaw Air Force Base. It was reactivated on 20 August 2020, merging the previous units of the Ninth Air Force and Twelfth Air Force into a new numbered air force responsible for generating and presenting Air Combat Command’s conventional forces. On 20 August 2020, 15 AF was reactivated as an Air Combat Command numbered air force, taking over the previous conventional flying forces of both the Ninth and Twelfth Air Forces.