As a consequence of Bedir Khan's rebellion, the emirate of Bohtan was dissolved and Yezdanşêr succeeded him as "mütesellim" of Jazirat Ibn ʿUmar. Also, the "eyalet" of Kurdistan was formed on 5 December 1847, and included the "kazas" of Jazirat Ibn ʿUmar and Bohtan. Yezdanşêr met with Lieutenant Colonel (later General) Fenwick Williams at Jazirat Ibn ʿUmar in 1849 whilst he participated as the British representative in a commission to settle the Ottoman-Iranian border. Yezdanşêr was soon replaced by the "kaymakam" Mustafa Pasha, sent away to Constantinople in March 1849, and forbidden from returning to Jazirat Ibn ʿUmar. In 1852, the "iane-i umumiye" (temporary tax) was introduced, and the "kaza" of Jazirat Ibn ʿUmar was expected to provide 23,140 piastres. During the Crimean War, in 1854, Yezdanşêr was ordered to recruit soldiers for the war, and 900 Kurds were recruited from Jazirat Ibn ʿUmar and Bohtan. Yezdanşêr claimed to be maltreated by local officials and revolted in November, with Jazirat Ibn ʿUmar under his control. He offered to surrender in January 1855 on the condition that he received the "kazas" of Jazirat Ibn ʿUmar and Bohtan, but this was rejected. An Ottoman army consisting of a regiment of infantry, a regiment of cavalry, and a battery of six guns was ordered to march on Jazirat Ibn ʿUmar in February. In March, Yezdanşêr accepted terms offered by General Williams, the British military commissioner with the Ottoman Anatolian army, and surrendered.