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
Multinational Joint Task Force Multinational Joint Task Force The Multinational Joint Task Force (MNJTF) is a combined multinational formation, comprising units, mostly military, from Benin, Cameroon, Chad, Niger, and Nigeria. It is headquartered in N'Djamena and is mandated to bring an end to the Boko Haram insurgency. The task force was first organised as a solely Nigerian force in 1994, during the administration of Sani Abacha, to "checkmate banditry activities and to facilitate free movement" along its northern border. In 1998 it was expanded to include units from neighbouring Chad and Niger with the purpose of dealing with common cross-border security issues in the