ハウサ諸王国
The Tunjur people founded the Wadai Empire to the east of Bornu in the 16th century. In the 17th century, the Maba people revolted and established a Muslim dynasty. At first, Wadai paid tribute to Bornu and Durfur, but by the 18th century Wadai was fully independent and had become an aggressor against its neighbors. To the west of Bornu, by the 15th century the Kingdom of Kano had become the most powerful of the Hausa Kingdoms, in an unstable truce with the Kingdom of Katsina to the north. Both of these states adopted Islam in the 15th and 16th centuries. Both were absorbed into the Sokoto Caliphate during the Fulani War of 1805, which threatened Bornu itself.