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
Geography of Niger longest border is with Nigeria to the south, at 1,608 km. This is followed by Chad to the east (1,196 km), Algeria to the north-northwest (951 km), and Mali to the west (838 km). Niger also has short borders in its far southwest frontier (Burkina Faso at 622 km and Benin at 277 km) and to the north-northeast (Libya at 342 km). Geography of Niger Niger is a landlocked nation in West Africa located along the border between the Sahara and Sub-Saharan regions. Its geographic coordinates are longitude 16°N and latitude 8°E. Its area is 1.267 million square kilometers, of