Ghana Empire
By the late twelfth century, the formerly dominant Ghana Empire had collapsed, following internal strife and political intervention of the Almoravids in the eleventh century. A number of smaller neighboring states rushed to fill the power void, including the Sosso people of the Kaniaga kingdom, and the Mandinka people of the Upper Niger. Under the leadership of Soumaro Kanté, the Sosso seized Koumbi Saleh, former capital of the Ghana Empire, and expanded outward, conquering the Mandinka among others.