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RAF Rivenhall in Essex, designated USAAF Station AAF-168, had a short but distinctive wartime life shaped by the fast-moving needs of Ninth Air Force tactical air power. Opened in late 1943, it initially hosted USAAF fighter and medium bomber units whose role was directly connected to the coming invasion of Europe. Unlike the long-established heavy bomber stations, Rivenhall’s purpose was to project tactical air power – fighters to protect and attack, and medium bombers to hit bridges, railheads and strongpoints.
One of the first key occupants was the 363rd Fighter Group, equipped with early-model P-51 Mustangs. The group’s squadrons (including the 380th, 381st and 382nd Fighter Squadrons) were among the early USAAF Mustang units in Britain. The P-51’s speed, range and performance made it increasingly central to Allied air operations, and Rivenhall’s fighter phase reflects the rapid dispersal and movement of Ninth Air Force units as they prepared to operate closer to the front once the invasion began.
After the fighter group moved on in April 1944, the airfield became associated with the 397th Bombardment Group, flying the Martin B-26 Marauder. The 397th consisted of four squadrons: the 596th (code X2), 597th (9F), 598th (U2) and 599th (6B) Bomb Squadrons. The Marauder was a fast, hard-hitting medium bomber used for precise tactical attacks. From Essex, the 397th trained and then struck targets such as bridges, marshalling yards and fortified positions – exactly the kind of objectives that could choke German movement and reinforce Allied ground plans. These missions were especially important in the period immediately before and after D-Day, when air power was tasked with isolating the battlefield and reducing the enemy’s ability to concentrate forces.
Rivenhall’s operational phase with the Marauders was intense but relatively brief. As Allied armies broke out from Normandy and the front moved rapidly, bomber groups were shifted to bases better positioned for the new radius of action. In August 1944 the 397th moved south to RAF Hurn, illustrating how tactical air units followed the shifting geography of war. Later, Rivenhall passed into RAF use and supported special duties and transport-related squadrons, including operations connected with supplying resistance forces – another reminder of how the same airfield could serve very different wartime needs across short timespans.
Rivenhall’s historical importance therefore lies in its flexibility and its link to tactical air power: Mustangs and Marauders, fighters and medium bombers, fast redeployment and mission focus on transportation and battlefield targets. It is a compact case study in how the Allied air forces built and used airfields to support the invasion and liberation of Western Europe.
WW2 units, roles and aircraft:
- USAAF Station AAF-168 – Ninth Air Force
- 363rd Fighter Group – P-51 Mustang (early 1944); squadrons 380th, 381st, 382nd
- 397th Bombardment Group – Martin B-26 Marauder; squadrons 596th (X2), 597th (9F), 598th (U2), 599th (6B)
Rivenhall also illustrates the tempo of tactical air forces: fast moves, short periods on station, then redeployment as the front shifted. That mobility was a strategic advantage, allowing the Allies to keep aircraft within effective range and to maintain pressure on communications and bridges as the campaign advanced.