e ▁in ▁West ▁Fland ers , ▁Belg ium ▁and ▁equ ipped ▁with ▁the ▁S op with ▁Cam el . ▁On ▁ 7 ▁August ▁ 1 9 1 7 , ▁he ▁was ▁appointed ▁a ▁F lying ▁Officer ▁in ▁the ▁R FC ▁with ▁the ▁temporary ▁rank ▁of ▁second ▁lieutenant . ▁A ▁month ▁later , ▁on ▁ 1 4 ▁September , ▁while ▁taking ▁part ▁in ▁an ▁off ensive ▁pat rol , ▁Sen ▁experienced ▁engine ▁failure ▁and ▁dropped ▁behind ▁the ▁rest ▁of ▁his ▁pat rol . ▁As ▁he ▁stated ▁later ▁in ▁a ▁de position ▁for ▁the ▁War ▁Office , ▁"... in ▁attempting ▁to ▁catch ▁up ▁[ with ▁the ▁remainder ▁of ▁the ▁pat rol , ▁I ] ▁was ▁lost ▁in ▁a ▁cloud . ▁Com ing ▁out ▁[ I ] ▁was ▁attacked ▁by ▁ 4 ▁enemy ▁machines . ▁Both ▁[ f uel ] ▁t anks ▁[ w ere ] ▁hit ▁& ▁[ I ] ▁crash ed ▁outside ▁Men in . ▁Un w ounded ." ▁ ▁He ▁was ▁intern ed ▁in ▁Hol zm inden ▁prisoner - of - war ▁camp ▁for ▁the ▁remainder ▁of ▁the ▁war . ▁He ▁was ▁a ▁particip ant ▁in ▁the ▁attempted ▁mass ▁escape ▁from ▁the ▁camp ▁on ▁ 2 3 / 2 4 ▁July ▁ 1 9 1 8 , ▁but ▁was ▁in ▁the ▁escape ▁tunnel ▁when ▁it ▁partially ▁col lapsed , ▁resulting ▁in ▁the ▁abandon ment ▁of ▁the ▁enter prise . ▁He ▁was ▁eventually ▁rep atri ated ▁to ▁the ▁UK ▁on ▁ 1 4 ▁December ▁ 1 9 1 8 . ▁ ▁Post war ▁years