History of Chad Africa's major language groupings south of the Sahara Desert (except Khoisan, which is not considered a valid genetic grouping anyway), i. e. the Afro-Asiatic, Nilo-Saharan and Niger–Congo phyla, originated in prehistoric times in a narrow band between Lake Chad and the Nile Valley. The origins of Chad's peoples, however, remain unclear. Several of the proven archaeological sites have been only partially studied, and other sites of great potential have yet to be mapped. At the end of the 1st millennium AD, the formation of states began across central Chad in the sahelian zone between the desert and the savanna. For
Nigeria Nigeria The Federal Republic of Nigeria, commonly referred to as Nigeria (), is a federal republic in West Africa, bordering Niger in the north, Chad in the northeast, Cameroon in the southeast, and Benin in the west. Its coast in the south is located on the Gulf of Guinea in the Atlantic Ocean. The federation comprises 36 states and 1 Federal Capital Territory, where the capital, Abuja is located. Nigeria is officially a democratic secular country. Nigeria has been home to a number of ancient and indigenous kingdoms and states over the millennia. The modern state originated from British colonial