Hausa states

group of neighbouring African states, occasionally interconnected from the mid-14th century by loose alliances. Their territory lay above the confluence of the Niger and Benue rivers (in present-day northern Nigeria), between the Songhai empire in the west and that of the Kanem-Bornu, or Bornu, in the east. The seven true Hausa states, or Hausa Bakwai (Biram, Daura, Gobir, Kano, Katsina, Rano, and Zaria [Zazzau]), and their seven outlying satellites, or Banza Bakwai (Zamfara, Kebbi, Yauri, Gwari, Nupe, Kororofa [Jukun], and Yoruba), had no central authority, were never combined in wars of conquest, and were therefore frequently subject to domination from outside. Isolated until the 14th century, they were then introduced to Islam by missionaries from Mali. Conquered early in the 19th century by Fulani, in whose jihad, or “holy war,” many Hausa peasants had voluntarily combined, they were organized into emirates. At the beginning of the 20th century, the British took over the administration of the former emirates, to which they attached Bornu to form the northern provinces (subsequently the Northern Region) of the Protectorate of Nigeria.