British West Africa, formerly the British possessions in western Africa. By 1965 all had become independent or merged with other countries. The possessions were: Sierra Leone, Nigeria, Gold Coast (Ghana), British Togoland (part of Ghana), British Cameroons (divided between Cameroon and Nigeria), and Gambia.
Sahara, the vast desert of northern Africa, and the world's largest arid region. It occupies much of the broad northern half of Africa and covers some 3,500,000 square miles (9,000,000 km2), an area only slightly less than that of the United States.