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 environment surrounding the pipeline. One of the main efforts of the Catholic Relief Services has been to review and correct compensation packages received by those located along the pipeline, as well as advocating for fair salaries for local workers contracted by the oil companies. Chad–Cameroon Petroleum Development and Pipeline Project The Chad–Cameroon Petroleum Development and Pipeline Project is a controversial project to develop the production capacity of oilfields near Doba in southern Chad, and to create a pipeline to transport the oil to a floating storage and offloading vessel (FSO), anchored off the coast of Cameroon, near the city of