Senegambia, encompassing the coast from the Senegal River to the Casamance River, where captives as far away as the Upper and Middle Niger River Valley were sold; The Sierra Leone region included territory from the Casamance to the Assinie in the modern countries of Guinea-Bissau, Guinea, Sierra Leone, Liberia and Côte d'Ivoire; The Gold Coast region consisted of mainly modern Ghana; The Bight of Benin region stretched from the Volta River to the Benue River in modern Togo, Benin and southwestern Nigeria; The Bight of Biafra extended from southeastern Nigeria through Cameroon into Gabon; West Central Africa, the largest region, included the Congo and Angola; and East and Southeast Africa, the region of Mozambique-Madagascar included the modern countries of Mozambique, parts of Tanzania and Madagascar.[6]