Dee ihe ọzọ maka paragraf a - N'afọ 1941 ọ sonyeere ndị Royal Air Force, ma site n'oge oyi na-efe efe na-alụ ọgụ na No. 121 (Eagle) Squadron, nke ndị ọrụ afọ ofufo America mejupụtara. Onye ọkwọ ụgbọelu Mahon merụrụ atọ German na-alụ ọgụ na abụọ Focke-Wulf Fw 190s na Eprel na a Messerschmitt Bf 109 na May, tupu ya akara mbụ ya kwupụtara mmeri nke abụọ Fw 190s, gburu na Saint-Omer ebe, na June 8, 1942. N'abalị iri atọ na otu nke ọnwa Julaị, o gburu Fw 190 abụọ ọzọ n'ebe dị nso na Berck-Sur-Mer ma bụrụ onye a ma ama mgbe ọ na-akọ maka mwakpo ndị commando mere na Dieppe.
, Ọgọst 19, 1942, bụ onye nke 98 n'ime ndị ọkwọ ụgbọelu na - alụ agha. N'elekere 08:30, na-efe ụgbọelu Spitfire Vb ya, nke a na-akpọ "Barry", Mahon gburu otu Fw 190 na Fw 190 ọzọ tupu ụgbọelu ya adaa ma a manyere ya ịpụ n'ụgbọelu ahụ na-ere ọkụ. Mgbe o rutere n'oké osimiri, a dọọrọ ya n'agha. Ọ bụ ezie na Mahon gbara akwụkwọ maka igbu ndị Germany abụọ n'ụbọchị ahụ, e nyere ya otuto maka otu mgbe agha ahụ gasịrị. N'ihi ya, n'ihi ihe ndekọ ndekọ nke mmadụ ise a kwadoro, mmadụ abụọ nwere ike na mmadụ atọ mebiri emebi, Mahon natara British Distinguished Flying Cross na 1985.