9 0 6 ▁and ▁was ▁less ▁certain ▁that ▁the ▁French ▁would ▁conform ▁to ▁German ▁assumptions . ▁Mol t ke ▁adapted ▁the ▁deployment ▁and ▁concentration ▁plan , ▁to ▁accommod ate ▁an ▁attack ▁in ▁the ▁centre ▁or ▁an ▁en velop ing ▁attack ▁from ▁both ▁fl anks ▁as ▁variants ▁to ▁the ▁plan , ▁by ▁adding ▁divisions ▁to ▁the ▁left ▁fl ank ▁opposite ▁the ▁French ▁front ier , ▁from ▁the ▁ ▁expected ▁to ▁be ▁mobil ised ▁in ▁the ▁ ▁( western ▁army ). ▁The ▁main ▁German ▁force ▁would ▁still ▁advance ▁through ▁Belg ium ▁and ▁attack ▁south wards ▁into ▁France , ▁the ▁French ▁arm ies ▁would ▁be ▁en velop ed ▁on ▁the ▁left ▁and ▁pressed ▁back ▁over ▁the ▁Me use , ▁A is ne , ▁Som me , ▁O ise , ▁Mar ne ▁and ▁Seine , ▁unable ▁to ▁withdraw ▁into ▁central ▁France . ▁Either ▁the ▁French ▁would ▁be ▁anni h il ated ▁or ▁the ▁man oe uv re ▁from ▁the ▁north ▁would ▁create ▁conditions ▁for ▁victory ▁in ▁the ▁centre ▁or ▁in ▁Lor raine ▁on ▁the ▁common ▁border . ▁ ▁Battle ▁of ▁the ▁Front iers , ▁ 7 ▁August ▁– ▁ 1 3 ▁September ▁ ▁The ▁Battle ▁of ▁the ▁Front iers ▁is ▁a ▁general ▁name ▁for ▁all ▁of ▁the ▁operations ▁of ▁the ▁French ▁arm ies ▁until ▁the ▁Battle ▁of ▁the ▁Mar ne . ▁A ▁series ▁of ▁encounter ▁batt les ▁began ▁between ▁the ▁German , ▁French ▁and ▁Belg ian ▁arm ies , ▁on ▁the ▁German - F rench ▁front ier ▁and ▁in ▁southern ▁Belg ium ▁on ▁ 4 ▁August ▁