<prompt> Bhala okuqhubekayo kwalesi sigaba - Ngo-1941 wajoyina iRoyal Air Force, futhi ebusika wayeseba isosha elindizayo neNo. 121 Eagle Squadron, eyakhiwa amavolontiya aseMelika. I-Pilot Officer Mahon yalimaza ama-fighter amathathu aseJalimane kanye nama-Focke-Wulf Fw 190 amabili ngo-Ephreli kanye ne-Messerschmitt Bf 109 ngoMeyi, ngaphambi kokuthola ukunqoba kwakhe kokuqala okuqinisekisiwe kwama-Fw 190 amabili, adutshulwa endaweni yaseSaint-Omer, ngoJuni 8, 1942. NgoJulayi 31 wabhubhisa amanye ama-Fw 190 amabili endaweni yaseBerck-Sur-Mer futhi waba yi-ace ngenkathi ehlanganisa ukuhlaselwa kwe-commando eDieppe  <response>: , ngo-August 19, 1942, waba umshayeli wezindiza wezindiza ezingu-98. Ngo-08:30, ehamba nge-Spitfire Vb yakhe, ebizwa ngokuthi uBarry, uMahon wadutshulwa yi-Fw 190 nenye i-Fw 190 ngaphambi kokuba indiza yakhe ishaywe futhi waphoqeleka ukuba aphume endizeni evuthayo. Lapho efika olwandle, wathunjwa. Nakuba uMahon afaka isimangalo sokudubula amaJalimane amabili ngalolo suku, wanikezwa udumo olulodwa kuphela ngemva kwempi. Ngakho-ke, ngenxa yerekhodi eliqinisekisiwe lezindiza ezinhlanu, ezimbili ezingaba khona kanye nezintathu ezilimele, uMahon wathola iBritish Distinguished Flying Cross ngo-1985. 