423d Air Base Group
The 423d Air Base Group is a United States Air Force installation-support unit headquartered at RAF Alconbury in the United Kingdom.
Last updated August 31, 2026
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Overview
The 423d Air Base Group is a United States Air Force support organization based at RAF Alconbury near Huntingdon, England. It provides installation management and mission-support services for U.S. military activities at RAF Alconbury and the nearby RAF Molesworth, whose principal customer is the Joint Analysis Center. The group also oversees geographically separated support elements at RAF Menwith Hill in the United Kingdom and Sola Air Station in Norway. The organization’s present form was activated on 12 May 2005. It replaced the 423d Air Base Squadron, which had operated from RAF Molesworth since 1995. The reorganization transferred the group headquarters to RAF Alconbury and placed the unit under the 501st Combat Support Wing, reflecting a broader restructuring of geographically separated U.S. Air Force support organizations in the United Kingdom. The group’s responsibilities are not centered on aircraft operations or consumer-facing products; instead, it sustains the infrastructure, communications, security, medical support, civil engineering, and personnel services required by operational units and mission partners. As described in reference material current to July 2022, the group comprised a headquarters staff and several subordinate units: the 421st Air Base Squadron at RAF Menwith Hill, the 423d Civil Engineer Squadron, 423d Communications Squadron, 423d Force Support Squadron, 423d Medical Squadron, 423d Security Forces Squadron, and the geographically separated 426th Air Base Squadron at Sola Air Station in Norway. These units collectively provide facilities management, information and communications support, force protection, health services, logistics and personnel support, community services, and other base-operating functions. The group also carries a substantial historical lineage. Its predecessor organization was constituted in 1942 as the 45th Air Depot Group and activated at Duncan Field, Texas, during the Second World War. After training in the United States, the group moved to England to support Ninth Air Force organizations. It later moved to continental Europe, where it performed depot, repair, supply, and reclamation functions. Following the Allied victory in Europe, it remained in Germany as part of the occupation forces until its inactivation in 1947. A related successor was activated in 1951 as the 73d Air Depot Wing. It moved to France and operated the Chateauroux Air Depot before being inactivated in 1953 during a wider Air Force conversion of support organizations. The lineage was later disbanded in 1983, reconstituted in 2005, and redesignated as the 423d Air Base Group. The modern group therefore combines a contemporary overseas-installation support mission with lineage extending to wartime American air-depot operations in Europe.
History
The lineage of the 423d Air Base Group begins with the 45th Air Depot Group, constituted on 31 January 1942 and activated on 13 March 1942 at Duncan Field, Texas. During its initial period in the United States, the organization trained and developed the depot-support capabilities needed for overseas operations. It moved through several American stations, including Springfield, Illinois, and Brookley Field, Alabama, before deploying to England in July 1943. In England, the group supported Ninth Air Force operations. Its principal wartime components included depot repair and depot supply functions, supplemented at different times by mobile reclamation and repair squadrons and other specialist elements. As Allied forces advanced across Europe, the group moved to continental locations. Its wartime stations included Chartres and several airfields in France, followed by locations in Germany. These movements reflected the mobile nature of Army Air Forces logistics and maintenance support during the European campaign. After V-E Day, the organization remained in Germany as part of the occupation structure. It was redesignated the 45th Air Depot around January 1946 and was inactivated around the end of August 1947. A successor lineage was established when the 73d Air Depot Wing was activated at Kelly Field, Texas, on 9 January 1951. The wing moved to Chateauroux Air Base in France in July of that year and operated the Chateauroux Air Depot. It was inactivated on 15 November 1953 and replaced by the 7373d Air Depot Wing as the Air Force shifted many support organizations into table-of-distribution structures. The lineage was subsequently disbanded in 1983. The modern organization emerged from the post-Cold War restructuring of U.S. Air Force support arrangements in the United Kingdom. The 423d Air Base Squadron was activated at RAF Molesworth on 12 July 1995. It followed the inactivation of the 710th Air Base Wing and the relocation of the 10th Air Base Wing from RAF Alconbury to Colorado in 1994. On 12 May 2005, the 423d Air Base Group was reconstituted and activated, replacing the squadron. Its headquarters moved to RAF Alconbury, and the group became part of the 501st Combat Support Wing. The 2005 reorganization brought several geographically separated support responsibilities together under a single group structure. The 423d Medical Squadron was established within the modern organization in 2007, while the 426th Air Base Squadron at Sola Air Station in Norway was assigned to the group in September of that year. The 423d Communications Squadron joined the structure in 2011, and the 421st Air Base Squadron at RAF Menwith Hill became part of the group in 2015. By July 2022, the group consisted of its headquarters and seven principal subordinate units: the 421st Air Base Squadron, 423d Civil Engineer Squadron, 423d Communications Squadron, 423d Force Support Squadron, 423d Medical Squadron, 423d Security Forces Squadron, and 426th Air Base Squadron. Its contemporary role is to provide the base-level services that allow U.S. Air Force and joint mission organizations in the United Kingdom and Norway to operate, while maintaining the historical lineage of American air-depot support units that served in Europe during and after the Second World War.
- 2015
Assignment of the 421st Air Base Squadron
[1]The 421st Air Base Squadron at RAF Menwith Hill joined the group on 18 July 2015.
- 2011
Communications function added
[1]The 423d Communications Squadron became part of the group on 15 January 2011.
- 2007
Expansion to Norway
[1]The 426th Air Base Squadron at Sola Air Station in Norway was assigned to the group on 11 September 2007.
- 2005
Activation of the modern group
[1]The lineage was reconstituted and redesignated as the 423d Air Base Group on 22 March 2005; the group was activated on 12 May and headquartered at RAF Alconbury.
- 1995
Activation of the 423d Air Base Squadron
[1]The immediate predecessor of the present group was activated at RAF Molesworth on 12 July 1995.
- 1953
Inactivation in France
[1]The 73d Air Depot Wing was inactivated on 15 November 1953 during an Air Force restructuring of depot-support organizations.
- 1951
Activation of the 73d Air Depot Wing
[1]The successor 73d Air Depot Wing was activated at Kelly Field on 9 January 1951 and later operated the Chateauroux Air Depot in France.
- 1947
Postwar inactivation
[1]After serving with occupation forces in Germany, the 45th Air Depot Group was inactivated around 31 August 1947.
- 1944
Move to continental Europe
[1]The organization moved to France in October 1944 as Allied forces advanced through the European theater.
- 1943
Deployment to England
[1]The wartime depot-support group moved to RAF Grove in England in July 1943 to support Ninth Air Force operations.
Products and positioning
A U.S. Air Force overseas installation-support organization that enables mission operations through integrated infrastructure, security, communications, medical, engineering, and personnel services.
Military base operations
Installation support
The group’s core offering is non-combat installation support for U.S. Air Force and joint mission organizations at RAF Alconbury and RAF Molesworth. This includes coordinating the infrastructure and day-to-day services needed to keep assigned facilities functioning and to support the Joint Analysis Center and other mission partners.
Engineering services
Civil engineering and facilities support
The 423d Civil Engineer Squadron supports buildings, utilities, facilities, and related base infrastructure. Its role is to maintain and improve the physical environment in which personnel and mission organizations operate.
Information and communications services · 2011
Communications support
The 423d Communications Squadron provides communications and information-technology support for the group’s installations and supported organizations. The squadron’s inclusion reflects the importance of reliable information systems to geographically dispersed Air Force operations.
Security services
Force protection and security
The 423d Security Forces Squadron provides installation security and force-protection functions. These services help safeguard personnel, facilities, and mission operations at the group’s supported locations.
Personnel and health support · 2007
Medical and force support
The 423d Medical Squadron and 423d Force Support Squadron provide health, personnel, administrative, community, and quality-of-life support. Together, these functions sustain the personnel who work at the group’s installations and help maintain operational readiness.
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