▁constructed ▁by ▁the ▁ 4 7 7 th ▁A ero ▁Squadron ▁( Const ruction ) ▁in ▁seven ▁days ▁in ▁late ▁August ▁ 1 9 1 8 . ▁ ▁It ▁had ▁eight ▁French ▁" B ess onne au " ▁aircraft ▁hang ars ▁and ▁two ▁British ▁R AF ▁type ▁hang ars . ▁The ▁construction ▁also ▁ere cted ▁eight ▁wooden ▁bar ra cks ▁and ▁ 7 ▁other ▁buildings ▁for ▁maintenance ▁sh ops , ▁headquarters ▁and ▁a ▁small ▁clin ic . ▁ ▁First ▁to ▁arrive ▁were ▁two ▁French ▁esc adr illes , ▁BR ▁ 2 0 8 ▁and ▁BR ▁ 2 1 4 , ▁on ▁ 6 ▁September , ▁from ▁the ▁French ▁ 2 nd ▁Army ▁A viation , ▁and ▁working ▁with ▁the ▁American ▁First ▁Army . ▁They ▁were ▁followed ▁on ▁ 8 ▁September ▁by ▁the ▁ 5 0 th ▁A ero ▁Squadron ▁( Ob serv ation ), ▁flying ▁De ▁Hav ill and ▁D H - 4 s , ▁from ▁the ▁First ▁Army ▁Air ▁Service ' s ▁I ▁Corps ▁Observ ation ▁Group , ▁ready ▁for ▁the ▁heavy ▁push ▁towards ▁Saint ▁Mih iel ▁in ▁the ▁following ▁days . ▁ ▁They ▁had ▁all ▁gone ▁by ▁the ▁end ▁of ▁September , ▁and ▁the ▁air field ▁was ▁quiet ▁until ▁early ▁November , ▁before ▁the ▁Arm ist ice : ▁two ▁French ▁esc adr illes ▁stayed ▁for ▁a ▁few ▁days ▁( BR ▁ 2 1 8 ▁and ▁BR ▁ 2 2 8 ), ▁then ▁giving ▁way ▁the ▁three ▁esc adr illes ▁of ▁the ▁" Gr oupe ▁de ▁Bom bar de ment ▁no ▁