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
Chad–Cameroon Petroleum Development and Pipeline Project no term limits. A climate of intense corruption has created an unequal distribution of wealth and poor conditions for domestic and international investments. The portion of the pipeline owned by Cameroon is managed by the Cameroon Oil Transportation Company (COTCO). This company is incorporated in Cameroon, and is a joint venture between the governments of Cameroon and Chad, and the Upstream Consortium, an independent monitoring institution. The World Bank's support was very important for the Consortium of oil companies, as they believed they needed the support of the Bank in order for the project to succeed. While the project's private