91st Observation Squadron, 91st Observation Squadron, Medium, 91st Observation Squadron, 91st Reconnaissance Squadron, Bomber, 91st Tactical Reconnaissance Squadron, 91st Photographic Mapping Squadron, 91st Photographic Charting Squadron & 91st Reconn

Organized as 91st Aero Squadron on 21 Aug 1917. Redesignated: 91st Squadron on 14 Mar 1921; 91st Observation Squadron on 25 Jan 1923; 91st Observation Squadron (Medium) on 13 Jan 1942; 91st Observation Squadron on 4 Jul 1942; 91st Reconnaissance Squadron (Bomber) on 2 Apr 1943; 91st Tactical Reconnaissance Squadron on 11 Aug 1943; 91st Photographic Mapping Squadron on 9 Oct 1943; 91st Photographic Charting Squadron on 17 Oct 1944; 91st Reconnaissance Squadron, Long Range, Photographic on 15 Jun 1945; 91st Strategic Reconnaissance Squadron, Photographic on 25 Mar 1949; 91st Strategic Reconnaissance Squadron, Medium, Photographic on 6 Jul 1950; 91st Strategic Reconnaissance Squadron, Fighter on 20 Dec 1954. Inactivated on 1 Jul 1957.

Insignia approved on 12 Feb 1924. Chenille embroidery

Stations. Ft Lewis, WA, 30 Jun 1936; Wheeler-Sack Field, NY, 26 Sep 1941; Tullahoma, TN, 9 Sep 1942; Godman Field, KY, 7 Nov 1942; Reading AAFld, PA, 22 Sep 1943 (flights at various points in South and Central America during period Nov 1943-Aug 1946, especially at Talara, Peru, 1943-1944, Atkinson Field, British Guiana, 1944-1945, Recife, Brazil, 1944-1945, Howard Field, CZ, 1944-1946, and Natal, Brazil, 1945-1946); Peterson Field, CO, 25 Dec 1943; Buckley Field, CO, 2 Jul 1944.