Central Africa

Central Africa, region of Africa that straddles the Equator and is drained largely by the Congo River system. It comprises, according to common definitions, the Republic of the Congo (Brazzaville), the Central African Republic, and the Democratic Republic of the Congo (Kinshasa); Gabon is usually included along with the Central African Republic because of their common historical ties, both of these countries having once been part of French Equatorial Africa. Rwanda and Burundi, although they are located east of the East African Rift System, which forms the eastern divide of the Congo basin, are also often considered part of the region because of their long administrative connections with the former Belgian Congo (now Congo [Kinshasa]). The island republic of São Tomé and Príncipe, off the Atlantic coast of Gabon, is also included in the region. 

Content Source : Encyclopedia Britannica  https://www.britannica.com/place/central-Africa