▁J az ira ▁( Upper ▁Mes op ot am ia ) ▁to ▁Mu ' aw i ya ' s ▁Sy rian ▁governor ship ▁and ▁granted ▁the ▁latter ' s ▁request ▁to ▁take ▁possession ▁of ▁all ▁By z antine ▁crown ▁lands ▁in ▁Sy ria ▁to ▁help ▁pay ▁his ▁troops . ▁He ▁had ▁the ▁sur plus ▁tax es ▁from ▁the ▁wealth y ▁provinces ▁of ▁K uf a ▁and ▁Egypt ▁forward ed ▁to ▁the ▁tre as ury ▁in ▁Med ina , ▁which ▁he ▁used ▁at ▁his ▁personal ▁dispos al , ▁frequently ▁dis b urs ing ▁its ▁funds ▁and ▁war ▁boot y ▁to ▁his ▁Um ay y ad ▁relatives . ▁Moreover , ▁the ▁luc r ative ▁S as an ian ▁crown ▁lands ▁of ▁Ira q , ▁which ▁U mar ▁had ▁designated ▁as ▁commun al ▁property ▁for ▁the ▁benefit ▁of ▁the ▁Arab ▁g arrison ▁towns ▁of ▁K uf a ▁and ▁Bas ra , ▁were ▁turned ▁into ▁cal i phal ▁crown ▁lands ▁to ▁be ▁used ▁at ▁U th man ' s ▁dis cret ion . ▁Mount ing ▁res ent ment ▁against ▁U th man ' s ▁rule ▁in ▁Ira q ▁and ▁Egypt ▁and ▁among ▁the ▁Ans ar ▁and ▁Q ur ay sh ▁of ▁Med ina ▁cul min ated ▁in ▁the ▁sie ge ▁and ▁killing ▁of ▁the ▁cal i ph ▁in ▁ 6 5 6 . ▁In ▁the ▁assess ment ▁of ▁the ▁historian ▁Hugh ▁N . ▁Kennedy , ▁U th man ▁was ▁killed ▁because ▁of ▁his ▁determ ination ▁to ▁central ize ▁control ▁over ▁the ▁C ali ph ate ' s