Frank Alton Armstrong, Jr. (May 24, 1902 – August 20, 1969) was a brigadier general in the United States Army Air Forces and the inspiration for the main character in the novel and subsequent film, Twelve O'Clock High. After the war, he held a variety of senior leadership positions prior to and following the establishment of the United States Air Force as an independent service in 1947. Promoted to major general in 1950, he was later promoted to lieutenant general in 1956, eventually retiring at that rank.