▁kilom eters ▁in ▁the ▁S ector ▁of ▁General ▁W ink ler ' s ▁ 1 1 th ▁German - B ul gar ian ▁Army . ▁By ▁the ▁end ▁of ▁November ▁however ▁the ▁Bulg ari ans ▁and ▁Germ ans ▁were ▁able ▁to ▁firm ly ▁establish ▁themselves ▁on ▁the ▁Cher ven a ▁St ena ▁– ▁height ▁ 1 2 4 8 ▁– ▁Hill ▁ 1 0 5 0 ▁– ▁D ab ica ▁– ▁Gra de š nica ▁def ensive ▁line ▁and ▁subsequently ▁rep el ▁all ▁Al lied ▁attempts ▁to ▁dis l odge ▁them ▁of ▁their ▁positions . ▁This ▁brought ▁about ▁the ▁stabil ization ▁of ▁the ▁entire ▁front ▁line ▁and ▁forced ▁the ▁Al lies ▁to ▁call ▁off ▁the ▁off ensive ▁altogether . ▁The ▁oppos ing ▁sides ▁were ▁now ▁free ▁to ▁re group ▁their ▁exha usted ▁forces ▁and ▁fort ify ▁their ▁lines . ▁ ▁The ▁strateg ic ▁situation ▁in ▁the ▁early ▁spring ▁of ▁ 1 9 1 7 ▁on ▁all ▁European ▁the aters ▁of ▁war , ▁except ▁the ▁Roman ian ▁portion ▁of ▁the ▁Eastern ▁Front , ▁fav ored ▁the ▁implementation ▁of ▁the ▁Al lied ▁off ensive ▁plans ▁that ▁were ▁adopted ▁during ▁the ▁inter - al lied ▁conference ▁of ▁November ▁ 1 9 1 6 ▁held ▁in ▁Ch ant illy , ▁France . ▁These ▁plans ▁included ▁an ▁off ensive ▁on ▁the ▁Mac ed onian ▁Front ▁designed ▁to ▁support ▁main ▁the ▁Al lied ▁efforts ▁on ▁the ▁other ▁front s ▁and ▁if ▁possible ▁completely ▁defeat ▁Bulg aria ▁with ▁the ▁assistance ▁of ▁Russian ▁and ▁Roman ian ▁forces . ▁The ▁Bulg ari