In 892, a new Caliph, al-Mu'tadid, took the throne, determined to restore Abbasid control over the Jazira. In a series of campaigns, he achieved the submission of most local potentates, but Hamdan offered tenacious opposition. Holding the fortresses of Maridin and Ardamusht (near modern Cizre), and allied with the Kurdish tribes of the mountains north of the Jaziran plain, he held out until 895.