set out to relieve Kerbogha's siege of Mosul following a request for aid from the Uqaylid emir Ali ibn Sharaf al-Dawla of Mosul, but was defeated by Kerbogha's brother Altuntash, and submitted to him as a vassal. Jikirmish was forced to aid in the ultimately successful siege against his former ally, and thus came under the suzerainty of Kerbogha as Emir of Mosul. Kerbogha died in 1102, and Sultan Barkiyaruq appointed Jikirmish as his replacement as emir. Jazirat Ibn ʿUmar was thereafter directly ruled over by a string of Seljuk emirs of Mosul until the appointment of Zengi. Emir Aqsunqur al-Bursuqi of Mosul was murdered by Assassins in 1126, and was succeeded by his son Mas'ud. He died after several months, and his younger brother became emir with the mamluk Jawali serving as atabeg (regent). Jawali sent envoys to Sultan Mahmud II to receive official recognition for al-Bursuqi's son as emir of Mosul, but the envoys bribed the vizier Anu Shurwan to recommend Imad al-Din Zengi be appointed as emir of Mosul instead. The sultan appointed Zengi as emir in the autumn of 1127, but he had to secure the emirate by force as forces loyal to al-Bursuqi's son resisted Zengi, and retained control of Jazirat Ibn ʿUmar. After taking Mosul, Zengi marched north and besieged Jazirat Ibn ʿUmar; in an attack, he ferried soldiers across the river whilst others swam to the city, and eventually the city surrendered. Later, an Artuqid coalition of Da'ud of Hisn Kayfa, Timurtash of Mardin, and Ilaldi of Amid threatened Zengi's realm in 1130 whilst he campaigned in the vicinity of Aleppo in Syria, forcing him to return and defeat them at Dara. After the battle, Da'ud marched on Jazirat Ibn ʿUmar and pillaged its surroundings, thus Zengi advanced to counter him, and Da'ud withdrew to the mountains. The dozdar (governor of the citadel) of Jazirat Ibn ʿUmar, Thiqat al-Din Hasan, was reported to have sexually harassed soldiers' wives whilst their husbands were on campaign, and thus Zengi sent his hajib (chamberlain) al-Yaghsiyani to handle the situation. To avoid a rebellion, al-Yaghsiyani told Hasan he was promoted to dozdar of Aleppo, so he arranged to leave the city, but was arrested, castrated, and crucified by al-Yaghsiyani upon leaving the citadel. The Jewish scholar Abraham ibn Ezra visited the city in November 1142. On Zengi's death in 1146, his eldest son Sayf al-Din Ghazi I