521st Air Defense Group

World War II

The group was first activated as the 521st Air Service Group in a reorganization of Army Air Forces (AAF) support groups in which the AAF replaced service groups that included personnel from other branches of the Army and supported two combat groups with air service groups including only Air Corps units. It was designed to support a single combat group. Its 947th Air Engineering Squadron provided maintenance that was beyond the capability of the combat group, its 771st Air Materiel Squadron handled all supply matters, and its Headquarters & Base Services Squadron provided other support. The group returned to the US in 1945 and was inactivated. It was disbanded in 1948.

Cold War

The group was reconstituted, redesignated as the 521st Air Defense Group, and activated at Sioux City Municipal Airport in 1953 with responsibility for air defense of central Midwestern United States. It was assigned the 87th Fighter-Interceptor Squadron (FIS), which was already stationed at Sioux City Airport, and flying World War II era North American F-51 Mustangs as its operational component. The 87th FIS had been assigned directly to the 31st Air Division. The group replaced the 79th Air Base Squadron as the host USAF unit at Sioux City Municipal Airport. It was assigned three squadrons to perform its support responsibilities.

In the fall of 1953 the 87th FIS upgraded to radar equipped and Mighty Mouse rocket armed North American F-86D Sabre jet aircraft and the 14th Fighter-Interceptor Squadron, also flying Sabres, was activated as the group's second operational squadron. In November 1954 the 87th FIS moved to England and was reassigned. The 87th FIS was replaced the next month by the 519th Fighter-Interceptor Squadron, another Sabre squadron. The group was inactivated and replaced by the 53d Fighter Group (Air Defense) in 1955 as part of Air Defense Command's Project Arrow, which was designed to bring back on the active list the fighter units which had compiled memorable records in the two world wars. It was disbanded once again in 1984.

Lineage

• Constituted as the 521st Air Service Group : Activated on 1 January 1945 : Inactivated on or about 7 November 1945 : Disbanded on 8 October 1948
• Reconstituted and redesignated as 521st Air Defense Group on 21 January 1953 : Activated on 16 February 1953 : Inactivated on 18 August 1955 : Disbanded on 27 September 1984

Assignments

• XII Air Force Service Command, 1 January 1945
• Unknown, c. 17 July 1945 – 7 November 1945
• 31st Air Division, 1 January 1953 – 18 August 1955

Stations

• Ghisonaccia Airfield, Corsica, France, 1 January 1945 – 7 April 1945
• Fano Airfield, Italy 7 April 1945 – c. 6 July 1945
• Naples, Italy, c.. 6 July 1945 – c. 17 July 1945
• Camp Patrick Henry, Virginia, c. 26 Jul 1945 – c. 30 July 1945
• Unknown, July 1945–7 Nov 1945
• Sioux City Municipal Airport, Iowa, 1 January 1953 – 18 August 1955

Components

Operational Squadrons

• 14th Fighter-Interceptor Squadron, 18 November 1953 – 18 August 1955
• 87th Fighter-Interceptor Squadron, 16 February 1953 – 21 December 1954
• 519th Fighter-Interceptor Squadron, 8 December 1954 – 18 August 1955 Support Units
• 521st Air Base Squadron, 16 February 1953 – 18 August 1955
• 521st Materiel Squadron, 16 February 1953 – 18 August 1955
• 521st Medical Squadron (later 521st USAF Infirmary), 16 February 1953 – 18 August 1955
• 771st Air Materiel Squadron, 1 January 1945 – 1945
• 947th Air Engineering Squadron, 1 January 1945 – 1945

Aircraft

• North American F-51D Mustang, 1953
• North American F-86D Sabre, 1953–1955

Notes

; Explanatory notes

; Citations

References

• Buss, Lydus H.(ed), Sturm, Thomas A., Volan, Denys, and McMullen, Richard F., History of Continental Air Defense Command and Air Defense Command July to December 1955, Directorate of Historical Services, Air Defense Command, Ent AFB, CO, (1956)

References

1. Coleman, p. 208
2. [http://www.airforcehistoryindex.org/data/000/055/216.xml Abstract, History of 947th Air Engineering Squadron, Jan 1945] (retrieved 9 January 2012)
3. [http://www.airforcehistoryindex.org/data/000/072/853.xml Abstract, History of 771st Air Materiel Squadron, Jan 1945] (retrieved 9 January 2012)
4. The group supported [[310th Bombardment Group]] in Italy.[http://www.airforcehistoryindex.org/data/000/072/855.xml Abstract, History of 771st Air Materiel Squadron, Mar 1945] (retrieved 9 January 2012)
5. Department of the Air Force Letter, 322 (AFOOR 887e), 8 October 1948, Subject: Disbandment of Certain Inactive Air Force Units
6. Cornett & Johnson, p. 82
7. Cornett & Johnson, p.120
8. (20 August 2008). "Factsheet 87 Flying Training Squadron (AETC)". Air Force Historical Research Agency.
9. Maurer, ''Combat Squadrons'', pp. 299–300
10. Cornett & Johnson, p.147
11. [http://www.airforcehistoryindex.org/data/000/407/124.xml Abstract, History of 521st USAF Infirmary, Jan–Jun 1955] (retrieved 22 June 2012)
12. Cornett & Johnson, p.114
13. Maurer, ''Combat Squadrons'', p. 78
14. Cornett & Johnson, p.130
15. Maurer, ''Combat Squadrons'', pp. 623–624
16. Maurer, ''Combat Units'', p. 115
17. link. (4 January 2013 2/24/2009 (retrieved 3 March 2012))
18. Buss, Sturm, Volan, & McMullen, p.6
19. Department of the Air Force/MPM Letter 575q, 27 Sep 1984, Subject: Disbandment of Units
20. [http://www.airforcehistoryindex.org/data/000/102/945.xml Abstract, History of 521st Air Service Group, Jan–Feb 1945] (retrieved 22 June 2012)
21. [http://www.airforcehistoryindex.org/data/000/102/948.xml Abstract, History of 521st Air Service Group, Apr 1945] (retrieved 22 June 2012)