West Africa has part(s) Saint Helena, Ascension and Tristan da Cunha
Geopolitical division
Geopolitically, the United Nations definition of subregion Western Africa includes the preceding states with the addition of Mauritania (which withdrew from ECOWAS in 1999), comprising an area of approximately 6.1 million square km. The UN region also includes the United Kingdom Overseas Territory of Saint Helena, Ascension and Tristan da Cunha in the south Atlantic Ocean.
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