West Africa West Africa West Africa is the westernmost region of Africa. West Africa has been defined as including 17 countries: Benin, Burkina Faso, the island nation of Cape Verde, Gambia, Ghana, Guinea, Guinea-Bissau, Ivory Coast, Liberia, Mali, Mauritania, Niger, Nigeria, the islands of Saint Helena, Ascension and Tristan da Cunha, Senegal, Sierra Leone and Togo. The population of West Africa is estimated at about /1e6 round 0 million people as of . Studies of human mitochondrial DNA suggest that all humans share common ancestors from Africa, originated in the southwestern regions near the coastal border of Namibia and Angola at the
South West Africa which were united with the rest of the country in 1994. As a German colony from 1884, it was known as German South West Africa ("Deutsch-Südwestafrika"). Germany had a difficult time administering the territory, which experienced many insurrections, especially those led by guerilla leader Jacob Morenga. The main port, Walvis Bay, and the Penguin Islands were annexed by the UK in 1878, becoming part of the Cape Colony in 1884. Following the creation of the Union of South Africa in 1910, Walvis Bay became part of the Cape Province. As part of the Heligoland-Zanzibar Treaty in 1890, a corridor of