wy ▁was ▁surrender ed ▁by ▁its ▁g arrison ▁and ▁next ▁day , ▁British ▁Royal ▁Mar ines ▁and ▁a ▁party ▁of ▁the ▁Royal ▁Naval ▁Air ▁Service ▁( R N AS ) ▁land ed ▁at ▁Ost end ; ▁L ille ▁and ▁Me zi ères ▁were ▁occupied ▁by ▁German ▁troops . ▁Ar ras ▁was ▁occupied ▁on ▁ 2 7 ▁August ▁and ▁a ▁French ▁counter - off ensive ▁began ▁at ▁the ▁Battle ▁of ▁St . ▁Qu entin ▁( also ▁known ▁as ▁the ▁Battle ▁of ▁Gu ise ▁ ▁On ▁ 2 9 ▁August ▁the ▁Fif th ▁Army ▁counter - att ack ed ▁the ▁ 2 nd ▁Army ▁south ▁of ▁the ▁O ise , ▁from ▁Ver v ins ▁to ▁Mont ▁Dor igny ▁and ▁west ▁of ▁the ▁river ▁from ▁Mont ▁Dor igny ▁to ▁Mo y ▁towards ▁St . ▁Qu entin ▁on ▁the ▁Som me , ▁while ▁the ▁British ▁held ▁the ▁line ▁of ▁the ▁O ise ▁west ▁of ▁La ▁F ère . ▁La on , ▁La ▁F ère , ▁and ▁Ro ye ▁were ▁captured ▁by ▁German ▁troops ▁on ▁ 3 0 ▁August ▁and ▁Am iens ▁the ▁next ▁day . ▁On ▁ 1 ▁September ▁Cra onne ▁and ▁So iss ons ▁were ▁captured ▁and ▁on ▁ 5 ▁September ▁the ▁BE F ▁ended ▁its ▁retre at ▁from ▁M ons , ▁German ▁troops ▁reached ▁Cl aye , ▁ ▁from ▁Paris , ▁Re ims ▁was ▁captured , ▁German ▁forces ▁with d rew ▁from ▁L ille ▁and ▁the ▁First ▁Battle ▁of ▁the ▁Mar ne ▁( B attle ▁of ▁the ▁Our c q ) ▁ ▁began , ▁mark