In the Umayyad capital Damascus, Yazid was succeeded by his young son Mu'awiya II, but the latter wielded virtually no authority and died from illness months after his accession. This left a leadership void in Syria as there were no suitable successors among Mu'awiya I's Sufyanid house. In the ensuing chaos, Umayyad authority collapsed across the caliphate and Ibn al-Zubayr gained wide recognition. Most of the Islamic provinces offered their allegiance, including Egypt, Kufa, Yemen and the Qaysi tribes of northern Syria. Likewise, in Khurasan, the "de facto" governor Abd Allah ibn Khazim al-Sulami offered his recognition. Ibn al-Zubayr appointed his brother Mus'ab as governor of Basra and its dependencies. In a testament to the extent of Ibn al-Zubayr's sovereignty, coins were minted in his name as far as the districts of Kerman and Fars in modern-day Iran; both were dependencies of Basra. Nonetheless, his authority outside of the Hejaz was largely nominal.