as ▁Farm , ▁before ▁being ▁pushed ▁back ▁to ▁their ▁start ▁line . ▁The ▁batt alion ▁suffered ▁so ▁many ▁cas ual ties ▁that ▁it ▁had ▁to ▁be ▁re organ ised ▁as ▁a ▁single ▁company . ▁ 1 7 3 rd ▁Brigade ▁was ▁rel ieved ▁by ▁ 1 7 4 th ▁B de , ▁which ▁continued ▁attack ing ▁on ▁ 3 0 ▁October . ▁After ▁the ▁failure ▁of ▁the ▁battle , ▁ 5 8 th ▁Division ▁continued ▁to ▁hold ▁the ▁line ▁at ▁P ole cap elle ▁through ▁the ▁winter ▁months . ▁ ▁Re organisation ▁ 5 8 th ▁Division ▁was ▁transferred ▁to ▁the ▁south ▁in ▁January ▁ 1 9 1 8 . ▁Here ▁it ▁spent ▁time ▁dig ging ▁def ences , ▁converting ▁former ▁French ▁positions ▁into ▁the ▁newly ▁de vised ▁def ences ▁in ▁depth . ▁The ▁BE F ▁was ▁suffering ▁a ▁man power ▁short age , ▁and ▁its ▁brig ades ▁were ▁reduced ▁from ▁a ▁four - b att alion ▁to ▁a ▁three - b att alion ▁establishment . ▁In ▁ 1 7 3 rd ▁B de ▁this ▁resulted ▁in ▁ 2 / 1 st ▁B n ▁being ▁broken ▁up ▁on ▁ 3 1 ▁January ▁and ▁its ▁men ▁draft ed ▁to ▁the ▁other ▁batt al ions ▁of ▁the ▁brig ade ▁and ▁to ▁ 1 / 4 th ▁B n ▁in ▁ 5 6 th ▁Division . ▁At ▁the ▁same ▁time ▁ 1 / 3 rd ▁B n ▁was ▁transferred ▁in ▁from ▁ 5 6 th ▁Division ▁to ▁be ▁am alg am ated ▁with ▁ 2 /