Hausa Kingdoms
The Hausa Kingdoms were first mentioned by Ya'qubi in the 9th century and they were by the 15th-century vibrant trading centers competing with Kanem–Bornu and the Mali Empire. The primary exports were slaves, leather, gold, cloth, salt, kola nuts, and henna. At various moments in their history, the Hausa managed to establish central control over their states, but such unity has always proven short. In the 11th-century, the conquests initiated by Gijimasu of Kano culminated in the birth of the first united Hausa Nation under Queen Amina, the Sultana of Zazzau but severe rivalries between the states led to periods of domination by major powers like the Songhai, Kanem and the Fulani.