 On 12 May 1941 the Luftwaffe attacked the base again but this time they bombed using Incendiary bombs.The attack had limited success with only minor damage caused and no personnel casualties.In September 1942, the airfield was allocated to the 8th United States Army Air Forces ostensibly for use as a fighter base by Republic P-47 Thunderbolts of the 56th Fighter Group from RAF Kings Cliffe but nothing is recorded of any use by that unit.