The successful conquest had alarmed the ruler of the Aq Qoyunlu, Alvand, who subsequently proceeded north from Tabriz, and crossed the Aras River in order to challenge the Safavid forces, and a pitched battle was fought at Sarur in which Ismail's army came out victorious despite being outnumbered by four to one. Shortly before his attack on Shirvan, Ismail had made the Georgian kings Constantine II and Alexander I of respectively the kingdoms of Kartli and Kakheti, attack the Ottoman possessions near Tabriz, on the promise that he would cancel the tribute that Constantine was forced to pay to the Ak Koyunlu once Tabriz was captured. After eventually conquering Tabriz and Nakhchivan, Ismail broke the promise he had made to Constantine II, and made both the kingdoms of Kartli as well as Kakheti his vassals.