▁cost ▁of ▁ ▁On ▁the ▁right , ▁French ▁caval ry ▁attempted ▁to ▁support ▁the ▁attack ▁but ▁without ▁how itz ers , ▁could ▁not ▁advance ▁in ▁level ▁terrain , ▁d otted ▁with ▁c ott ages ▁used ▁as ▁impro vised ▁strong ▁points . ▁The ▁German ▁def enders ▁sli pped ▁away ▁from ▁def ences ▁in ▁front ▁of ▁houses , ▁h ed ges ▁and ▁walls , ▁well ▁sight ed ▁to ▁keep ▁the ▁soldiers ▁invisible , ▁d ug ▁earth ▁having ▁been ▁scattered ▁rather ▁than ▁used ▁for ▁a ▁par ap et , ▁which ▁would ▁have ▁been ▁visible . ▁III ▁Corps ▁was ▁to ▁attack ▁the ▁next ▁German ▁line ▁of ▁defence ▁before ▁German ▁rein for c ements ▁could ▁reach ▁the ▁scene . ▁Rain ▁and ▁mist ▁made ▁air ▁reconna issance ▁impossible ▁on ▁ 1 4 ▁October ▁but ▁pat rol s ▁found ▁that ▁the ▁Germ ans ▁had ▁fallen ▁back ▁beyond ▁B aille ul ▁and ▁crossed ▁the ▁L ys . ▁ ▁Al lied ▁forces ▁completed ▁a ▁continuous ▁line ▁to ▁the ▁North ▁Sea ▁when ▁British ▁caval ry ▁and ▁inf antry ▁reached ▁a ▁line ▁from ▁Ste en wer ck – D ran out re , ▁after ▁a ▁slow ▁advance ▁against ▁German ▁re arg u ards , ▁in ▁poor ▁visibility ▁and ▁close ▁country . ▁III ▁Corps ▁closed ▁up ▁to ▁the ▁river ▁at ▁S ail ly , ▁Bac ▁St . ▁Maur , ▁Er qu ing hem ▁and ▁Pont ▁de ▁Nie ppe , ▁linking ▁with ▁the ▁caval ry ▁at ▁Rom arin . ▁On ▁ 1 6 ▁October , ▁the ▁British ▁secured ▁the ▁L ys ▁cross ings ▁and ▁late ▁in