In 870, the new Caliph, al-Mu'tamid, again sent envoys to Isa to persuade him to return the money, but Isa again refused, and an army under the Turk Amajur al-Turki, who was named governor of Damascus. Initially based in Tyre, Isa managed to push back Amajur's numerically much inferior forces—al-Tabari reports that Isa had 20,000 men while Amajur only 200–400—to Damascus, but in a battle before the city Isa's son al-Mansur fell, and he was defeated and he was forced to withdraw to Ramla. Instead of an army there came a new embassy from the Caliph (in 870 or 871), offering him the governorship of Armenia if he would abandon Syria.