Yusuf Ali founded the Sultanate of Obbia in 1870 after a dynastic dispute.
Evidence
Yusuf ‘Ali established himself as Sultan of Obbia, the hinterland of which is occupied by clansmen of both the Hawiye and Majerteyn, about 1870 after a dispute with the hereditary Majerteyn Sultan ‘Isman. Earlier, in 1839, a British commercial treaty had been signed with the Majerteyn clan. — I.M. Lewis, I. M. Lewis, A Modern History of the Somali_ Nation…, 745