The state was greatly harassed by Galla invaders in the 17th century, and broke up into a number of petty independent emirates and sultanates under Somali chiefs.
East of that river Sokoto and its tributary emirates are ruled by Fula princes, subject to the control of the British Nigerian administration.
Originally herdsmen in the western and central Sudan, they extended their sway east of the Niger, under the leadership of Othman Dan Fodio, during the early years of the 19th century, and having subdued the Hausa states, founded the empire of Sokoto with the vassal emirates of Kano, Gando, Nupe, Adamawa, &c.
There are two minor emirates, Shonga and Lafiagi in this province, and a number of semi-independent towns of which the chief are Awton, Ajassa, Offa and Patiji.
Burdon, "The Fulani Emirates," ibid.