EthiopiaOfficially Federal Democratic Republic of Ethiopia; Republic, 471,776 sq mi (1,221,900 sq km), NE Africa. Addis Ababa is the capital and largest city. The first kingdom for which there is documentary evidence is that of Aksum (Axum), a kingdom which probably emerged in the 2d cent. A.D., thus making Ethiopia the oldest independent country in Africa and one of the most ancient in the world.