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
Nigeria her husband and domestic violence are common. Women have less land rights. Maternal mortality was at 814 per 100,000 live births in 2015. Female genital mutilation is common. In 2015, there was a federal ban. In Nigeria, at least half a million suffer from vaginal fistula, largely as a result of lack of medical care. Early marriages can result in fistula. Most workers in the informal sector are women. Nigeria The Federal Republic of Nigeria, commonly referred to as Nigeria (), is a federal republic in West Africa, bordering Niger in the north, Chad in the northeast, Cameroon in the