▁sh elled ▁before ▁they ▁went ▁' over ▁the ▁top ', ▁at ▁ 1 6 . 4 5 , ▁but ▁the ▁batt alion ▁successfully ▁p iv oted ▁towards ▁its ▁objective ▁and ▁followed ▁the ▁new - style ▁cre eping ▁bar rage . ▁However , ▁its ▁objective ▁was ▁a ▁tren ch ▁that ▁had ▁either ▁been ▁ob liter ated ▁or ▁never ▁existed , ▁so ▁the ▁men ▁over shot ▁into ▁the ▁now - station ary ▁bar rage . ▁When ▁the ▁bar rage ▁res umed ▁adv ancing ▁at ▁ 1 7 . 2 5 , ▁the ▁mixed ▁up ▁companies ▁of ▁the ▁batt alion ▁captured ▁their ▁second ▁objective ▁(' Be ef ' ▁T rench ). ▁By ▁now , ▁both ▁fl anks ▁were ▁' in ▁the ▁air ' ▁( part icular ly ▁on ▁the ▁left , ▁where ▁the ▁R angers ▁had ▁been ▁held ▁up ▁by ▁the ▁' Qu ad ril ater al '). ▁After ▁dark ▁the ▁main ▁objective ▁was ▁only ▁held ▁by ▁advanced ▁parties ▁while ▁the ▁rest ▁of ▁the ▁batt alion ▁cleared ▁an ▁intermediate ▁position ▁(' B ul ly ' ▁T rench ) ▁in ▁their ▁rear . ▁These ▁advanced ▁posts ▁were ▁with dra wn ▁the ▁following ▁morning ▁while ▁the ▁fl anks ▁were ▁strength ened . ▁The ▁batt alion ▁was ▁rel ieved ▁from ▁Bul ly ▁T rench ▁at ▁mid night ▁on ▁ 1 0 / 1 1 ▁September . ▁The ▁total ▁cas ual ties ▁over ▁the ▁five ▁days ▁were ▁ 2 0 ▁officers ▁and ▁about ▁ 2 5 0 ▁other ▁ranks . ▁ ▁Mor val ▁ ▁For ▁the ▁Battle ▁of ▁Fl ers