The Mossi Kingdoms were a number of different powerful kingdoms in modern-day Burkina Faso which dominated the region of the Upper Volta River for hundreds of years. Increasing power of the Mossi kingdoms resulted in larger conflicts with regional powers. The Kingdom of Yatenga became a key power attacking the Songhai Empire between 1328 and 1477, taking over Timbuktu and sacked the important trading post of Macina.

When Askia Mohammad I became the leader of the Songhai Empire with the desire to spread Islam, he waged a Holy war against the Mossi kingdoms in 1497. Although the Mossi forces were defeated in this effort, they resisted attempts to impose Islam. Although there were a number of jihad states in the region trying to forcibly spread Islam, namely the Massina Empire and the Sokoto Caliphate, the Mossi kingdoms largely retained their traditional religious and ritual practices. Being located near many of the main Islamic states of West Africa, the Mossi kingdoms developed a mixed religious system recognizing some authority for Islam while retaining earlier African spiritual belief systems.

http://www.laaf.me/en/west-africa/kingdoms-and-empires/mossi-kingdoms.php

http://www.britannica.com/EBchecked/topic/393822/Mossi

http://www.britannica.com/EBchecked/topic/393828/Mossi-states