<prompt> Qedela umusho olandelayo: Ngo-1941 wajoyina iRoyal Air Force, futhi ebusika wayeseyizindiza zempi 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 amaFw 190 amabili ngaphezulu kwendawo yaseBerck-Sur-Mer futhi waba yi-ace ngenkathi ehlanganisa  <response>: Ukuhlasela kwama-commando eDieppe, ngo-August 19, 1942, umsebenzi wakhe wokuba umshayeli wezindiza wama-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. 