Just as nearby Duxford was known as the 'Duck pond' by American airmen, so Fowlmere was known as 'the Hen Puddle' because of the wet conditions that pervaded the bases during the winter of 1943-1944. The 339th Fighter Group had no choice but to persist and, flying their new P-51B Mustangs on operations from the end of April 1944, went on to record the highest claims of air and ground enemy aircraft victories in the space of one year. Fowlmere was sold to local farmers in 1957, and since 1988 part of the site has continued to operate as an airfield.