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RAF Chilbolton, near Andover in Hampshire, began as a modest satellite and relief landing ground before wartime demands transformed it into a hard-surfaced airfield with a surprisingly varied operational history. Opening in September 1940 as a satellite of RAF Middle Wallop, it first supported RAF Fighter Command during the closing stages of the Battle of Britain. Hurricanes of No. 238 Squadron and other short-stay fighter units used the field to provide cover across the south coast and the western approaches, flying patrols that protected ports, industrial areas and shipping lanes.
As the immediate invasion threat faded, Chilbolton’s role shifted. By late 1941 the station had gained a perimeter track and concrete dispersal pens, but it was then placed into care and maintenance because nearby airfields could cover the operational need. That lull ended as Allied planning for the liberation of Europe accelerated. Transferred to the USAAF as Station AAF-404 with the code ‘CB’, Chilbolton became part of Ninth Air Force’s tactical air power system, supporting ground operations rather than the deep strategic raids of the Eighth Air Force.
In early 1944 tactical reconnaissance squadrons briefly operated from the airfield with Spitfires and Mustangs, but Chilbolton soon became closely associated with the 368th Fighter Group. The group’s fighter squadrons flew Republic P-47 Thunderbolts and carried out escort, armed reconnaissance and ground-attack missions aimed at rail traffic, airfields, gun positions and troop movements. As D-Day approached and then unfolded, P-47s based at Chilbolton were part of the relentless air cover that kept pressure on German transport and reinforced the Allied breakout from the beachhead.
Chilbolton also played a role in airborne operations. Gliders and transport aircraft gathered here as the Allies prepared for major drops, and the airfield is particularly linked with preparations for Operation Market Garden in September 1944. Troop carrier aircraft and CG-4A gliders assembled, were marshalled and dispatched from southern England airfields like Chilbolton, with ground crews working to tight deadlines to rig gliders, load equipment and brief crews for long tows into contested skies.
- Primary wartime roles: Fighter Command relief and satellite operations; later USAAF tactical fighter and airborne staging.
- Notable units: No. 238 Squadron RAF (Hurricanes); USAAF 368th Fighter Group (P-47); troop carrier and glider elements linked to airborne operations.
- USAAF identity: Station AAF-404, code ‘CB’.
After the war, Chilbolton entered an unusual second life as a flight-test and development base. Jet-era programmes by Vickers-Supermarine and Folland used the long runway and open airspace for prototype work, linking the site to aircraft such as the Swift, Scimitar and Gnat. Even so, its Second World War significance lies in its flexibility: a field that moved from fighter defence to tactical strike and airborne support as the war’s centre of gravity shifted toward the continent.