▁of ▁Boy elles ▁and ▁the ▁tren ch ▁system ▁at ▁Bo is le ux - Saint - M arc . ▁Four ▁t anks ▁assist ed ▁against ▁Boy elles , ▁where ▁the ▁g arrison ▁surrender ed , ▁but ▁the ▁left ▁of ▁the ▁batt alion ▁was ▁held ▁up ▁by ▁the ▁Marc ▁position ▁until ▁the ▁troops ▁on ▁either ▁fl ank ▁pressed ▁forward ▁and ▁cleared ▁it . ▁The ▁batt alion ▁res umed ▁the ▁advance ▁at ▁ 1 6 . 3 0 , ▁attack ing ▁in ▁widely ▁extended ▁formation ▁and ▁suffering ▁few ▁cas ual ties , ▁capt uring ▁machine ▁guns ▁and ▁pat rolling ▁ 5 0 0 ▁yards ▁beyond ▁the ▁Germ ans ' ▁Boy elles ▁Reserve ▁tren ches . ▁ ▁Another ▁r ushed ▁attack ▁went ▁in ▁on ▁ 2 8 ▁August , ▁towards ▁Bul le court ▁to ▁clear ▁a ▁section ▁of ▁the ▁H inden burg ▁Line . ▁ 1 / 4 th ▁Lond ons ▁led ▁ 1 6 8 th ▁B de ▁in ▁support ▁of ▁ 1 6 9 th ▁B de , ▁some ▁of ▁whom ▁went ▁ast ray , ▁so ▁the ▁batt alion ▁had ▁to ▁m op ▁up ▁obst inate ▁German ▁po ckets ▁and ▁it ▁was ▁not ▁until ▁late ▁evening ▁that ▁the ▁area ▁was ▁cleared . ▁The ▁division ▁continued ▁the ▁attack ▁next ▁day , ▁ 1 / 4 th ▁Lond ons ▁being ▁in ▁support . ▁Bul le court ▁having ▁been ▁re capt ured ▁by ▁the ▁Germ ans , ▁the ▁division ▁attacked ▁again ▁on ▁ 3 1 ▁August , ▁with ▁ 1 / 4 th ▁Lond ons ▁in ▁the