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
Niger in 2011 that were judged internationally as free and fair. Following the adoption of the newest constitution of 2010 and the presidential elections, Mahamadou Issoufou was elected as the first president of the Seventh Republic. Niger is a landlocked nation in West Africa located along the border between the Sahara and Sub-Saharan regions. It borders Nigeria and Benin to the south, Burkina Faso and Mali to the west, Algeria and Libya to the north and Chad to the east. Niger lies between latitudes 11° and 24°N, and longitudes 0° and 16°E. Niger's area is of which is water. This makes