The 4th Fighter Group at RAF Debden had been created the preceding September by incorporating the veteran RAF Eagle squadrons into the USAAF .
The newly arrived 78th Fighter Group at RAF Goxhill had previously flown P - 38 Lightnings .
The 4th Fighter Group at RAF Debden had been created the preceding September by incorporating the veteran RAF Eagle squadrons into the USAAF , and the newly arrived 78th Fighter Group at RAF Goxhill had previously flown P - 38 Lightnings .