Jesus, like it's so fucking hard to educate yourself...
http://www.archaeolink.com/ancient_african_civilizations.htm
BTW, the word Country carries a lot of baggage. Our current idea of a country is a western style nationalist state, something that didn't exist as such until the late 18th century. Many years after European colonial powers had begun to rape Africa, and the rest of the world. So give 'em a break.