▁to ▁form ▁the ▁trib al ▁conf eder ation ▁of ▁Y aman . ▁The ▁bur geon ing ▁fe ud ▁between ▁the ▁two ▁trib al ▁coal itions ▁led ▁to ▁the ▁long - running ▁Q ays – Y aman ▁conflict ▁as ▁the ▁Q ays , ▁who ▁re group ed ▁in ▁the ▁Eu phr ates ▁river ▁for tr ess ▁of ▁Cir ces ium ▁under ▁Z uf ar ▁ibn ▁al - Har ith ▁al - K il abi , ▁moved ▁to ▁a ven ge ▁their ▁losses ▁from ▁Mar j ▁Rah it . ▁Although ▁Mar wan ▁reg ained ▁full ▁control ▁of ▁Sy ria ▁in ▁the ▁months ▁following ▁the ▁battle , ▁the ▁inter - t rib al ▁str ife ▁und erm ined ▁the ▁foundation ▁of ▁Um ay y ad ▁power , ▁the ▁Sy rian ▁army . ▁ ▁In ▁ 6 8 5 , ▁Mar wan ▁and ▁I bn ▁Bah dal ▁exp elled ▁the ▁Z ub ay rid ▁governor ▁of ▁Egypt ▁and ▁replaced ▁him ▁with ▁Mar wan ' s ▁son ▁Abd ▁al - Az iz , ▁who ▁would ▁rule ▁the ▁province ▁until ▁his ▁death ▁in ▁ 7 0 4 / 0 5 . ▁Another ▁son , ▁Muhammad , ▁was ▁appointed ▁to ▁suppress ▁Z uf ar ' s ▁re bell ion ▁in ▁the ▁J az ira . ▁Mar wan ▁died ▁in ▁April ▁ 6 8 5 ▁and ▁was ▁succeeded ▁by ▁his ▁el dest ▁son ▁Abd ▁al - Mal ik . ▁Although ▁U bay d ▁Al lah ▁attempted ▁to ▁restore ▁the ▁Sy rian ▁army ▁of ▁the ▁S uf yan id ▁cal i ph