Military Rank and Insignia

See the pamphlet  "Why is the Colonel called "Kernal?"  by Raymond Oliver, Office of History, Sacramento Air Logistics Center, 1983.

See also:  A Chronology of the Enlisted Rank Chevron of the United States Air Force by Barry L. Spink, Air Force Historical Research Agency, 1992.

Department of Defense -- US Military Rank Insignia.