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
Portuguese Guinea Portuguese Guinea Portuguese Guinea (), called the Overseas Province of Guinea from 1951, was a West African colony of Portugal from the late 15th century until 10 September 1974, when it gained independence as Guinea-Bissau. The Portuguese Crown commissioned its navigators to explore the Atlantic coast of West Africa to find the sources of gold. The gold trade was controlled by Morocco, and Muslim caravan routes across the Sahara also carried salt, kola, textiles, fish, grain, and slaves. The navigators first passed the obstruction of Cape Bojador in 1437 and were able to explore the West African coast as far