structural:expansion, stylistic:style_transfer, structural:scholar_edition, information:highlighting
Area

In the United Nations scheme of African regions, the region of Western Africa includes 16 states and the United Kingdom Overseas Territory of Saint Helena, Ascension and Tristan da Cunha: Mali, Burkina Faso, Senegal and the Niger are mostly in the Sahel, a transition zone between the Sahara desert and the Sudanian Savanna; Benin, Ivory Coast, The Gambia, Ghana, Guinea, Guinea-Bissau, Liberia, Sierra Leone, Togo and Nigeria compose most of Guinea, the traditional name for the area near the Gulf of Guinea; Mauritania lies in the Maghreb, the northwestern region of Africa that has historically been inhabited by West African groups such as the Fulani, Soninke, Wolof, Serer and Toucouleur people, along with Arab-Berber Maghrebi people such as the Tuareg; Cape Verde is an island country in the Atlantic Ocean; and Saint Helena, Ascension and Tristan da Cunha consists of eight main islands located in four different parts of the Atlantic. Due to Mauritania's increasingly close ties to the Arab World and its 1999 withdrawal from the Economic Community of West African States (ECOWAS), in modern times it is often considered, especially in Africa, as now part of western North Africa.