▁the ▁victim ▁of ▁a ▁combined ▁attack ▁by ▁his ▁numerous ▁enemies . ▁P ep in ▁immediately ▁made ▁peace ▁with ▁his ▁successor , ▁War at ton . ▁ ▁However , ▁War at ton ' s ▁successor , ▁Ber th ar , ▁and ▁the ▁Ne ust rian ▁king ▁The uder ic ▁III , ▁who , ▁since ▁ 6 7 9 , ▁was ▁nom inal ▁king ▁of ▁all ▁the ▁Fran ks , ▁made ▁war ▁on ▁Aust ras ia . ▁The ▁king ▁and ▁his ▁mayor ▁were ▁decis ively ▁defeated ▁at ▁the ▁Battle ▁of ▁Ter try ▁( Text rice ) ▁in ▁the ▁Verm ando is ▁in ▁ 6 8 7 . ▁Ber th ar ▁and ▁The uder ic ▁with d rew ▁themselves ▁to ▁Paris , ▁where ▁P ep in ▁followed ▁and ▁eventually ▁forced ▁on ▁them ▁a ▁peace ▁treat y ▁with ▁the ▁condition ▁that ▁Ber th ar ▁leave ▁his ▁office . ▁P ep in ▁was ▁created ▁mayor ▁in ▁all ▁three ▁Frank ish ▁kingdom s ▁( A ust ras ia , ▁Ne ust ria , ▁and ▁Burg und y ) ▁and ▁began ▁calling ▁himself ▁Duke ▁and ▁Prince ▁of ▁the ▁Fran ks ▁( du x ▁et ▁prince ps ▁Fran cor um ). ▁In ▁the ▁en su ing ▁quar rel s , ▁Ber th ar ▁killed ▁his ▁mother - in - law ▁An sf led ▁and ▁fled . ▁His ▁wife ▁An stru de ▁married ▁P ep in ' s ▁el dest ▁son ▁Dro go , ▁Duke ▁of ▁Champ agne , ▁and ▁P ep in ' s ▁place ▁in ▁Ne ust ria ▁was ▁secured