- May 2015
Where is Kanem-Bornu? Benin? The Sokoto Caliphate? Funj? Adal? Congo? The Toucouleur Empire? Kush? Aksum?
Nope, the first concrete mention comes from the first century AD. What are you refering to are the Proto-Aksumite cultures, who have not too much to do with later Aksum, except beeing on the same territory.
Probably the empire of Axum. The kingdom existed as early as 400 BCE