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 Armed Forces the African Union, Niger defense forces have been involved in multiple missions in the Africa and the West Africa. Niger has been a supporter and volunteered to participate in the African Union future rapid intervention forces. In addition, with the growing threat of Boko Haram, defense forces of Niger, Nigeria, Cameroon and Chad have intensified cooperation to address the trans-border threat of this organization. U.S. and France defense cooperation with Niger has intensified post 9/11 as part of the Global War on Terror. The Niger defense forces along with forces from Chad, Mali, Mauritania have become major partners of France