ena ▁( mod ern ▁southern ▁Tun is ia ), ▁where ▁U q ba ▁founded ▁the ▁permanent ▁Arab ▁g arrison ▁city ▁of ▁K air ou an . ▁ ▁Su cc ession ▁of ▁Y az id ▁I ▁and ▁collapse ▁of ▁S uf yan id ▁rule ▁In ▁contrast ▁to ▁U th man , ▁Mu ' aw i ya ▁restricted ▁the ▁influence ▁of ▁his ▁Um ay y ad ▁k ins men ▁to ▁the ▁governor ship ▁of ▁Med ina , ▁where ▁the ▁dispos s essed ▁Islam ic ▁el ite , ▁including ▁the ▁Um ay y ads , ▁were ▁susp icious ▁or ▁host ile ▁toward ▁his ▁rule . ▁However , ▁in ▁an ▁un pre ced ented ▁move ▁in ▁Islam ic ▁politics , ▁Mu ' aw i ya ▁nominated ▁his ▁own ▁son , ▁Y az id ▁I , ▁as ▁his ▁successor ▁in ▁ 6 7 6 , ▁introdu cing ▁her edit ary ▁rule ▁to ▁cal i phal ▁succession ▁and , ▁in ▁practice , ▁turning ▁the ▁office ▁of ▁the ▁cal i ph ▁into ▁a ▁king ship . ▁The ▁act ▁was ▁met ▁with ▁disapp ro val ▁or ▁opposition ▁by ▁the ▁Ira q is ▁and ▁the ▁He j az - based ▁Q ur ay sh , ▁including ▁the ▁Um ay y ads , ▁but ▁most ▁were ▁b rib ed ▁or ▁co er ced ▁into ▁accept ance . ▁Y az id ▁acc eded ▁after ▁Mu ' aw i ya ' s ▁death ▁in ▁ 6 8 0 ▁and ▁almost ▁immediately ▁faced ▁a ▁challenge ▁to ▁his ▁rule ▁by ▁the ▁K uf an ▁part is ans