▁down ▁an ▁enemy ▁bi plane ▁near ▁Ress ons - sur - M atz , ▁and ▁on ▁ 3 1 ▁May ▁he ▁and ▁Serge ant ▁Th el ot ▁shot ▁down ▁an ▁enemy ▁two - se ater ▁over ▁the ▁French ▁lines . ▁The ▁following ▁day , ▁ 1 ▁May , ▁he ▁and ▁Serge ant ▁Let u ▁brought ▁down ▁another ▁two - se ater ▁over ▁St - L é ger - au - Bo is . ▁He ▁received ▁his ▁second ▁c itation ▁on ▁ 1 9 ▁June , ▁and ▁on ▁ 3 ▁July ▁as ▁made ▁a ▁Che val ier ▁of ▁the ▁L ég ion ▁d ' honneur . ▁His ▁third ▁aer ial ▁victory ▁earned ▁him ▁a ▁third ▁c itation ▁on ▁ 1 4 ▁July . ▁Ar phe uil ▁shot ▁down ▁an ▁enemy ▁two - se ater ▁solo ▁on ▁ 2 0 ▁July , ▁receiving ▁his ▁fourth ▁c itation ▁on ▁ 9 ▁August . ▁ ▁On ▁ 1 3 ▁September ▁ 1 9 1 8 ▁Ar phe uil ▁was ▁appointed ▁commander ▁of ▁a ▁new ▁unit , ▁Esc adr ille ▁S PA . 1 7 0 , ▁station ed ▁in ▁Fland ers ▁as ▁part ▁of ▁Gr oupe ▁de ▁Ch asse ▁ 2 3 . ▁He ▁joined ▁the ▁unit ▁on ▁ 2 8 ▁September , ▁gain ing ▁his ▁fifth ▁aer ial ▁victory ▁on ▁ 1 4 ▁October , ▁and ▁ear ning ▁his ▁fifth ▁c itation . ▁However , ▁on ▁ 2 7 ▁October ▁ 1 9 1 8 ▁he ▁was ▁hospital ised ▁at ▁D unk irk , ▁possibly ▁suffering