former Belgian-administered United Nations trust territory in EC Africa: divided (1962) into the independent countries of Rwanda & Burundi
See Ruanda-Urundi in American Heritage Dictionary 4
A former colonial possession of central Africa. Once a part of German East Africa, the territory was occupied (1919) by Belgian troops during World War I and became (1961) a Belgian League of Nations mandate under the name Ruanda-Urundi. When independence was achieved in 1962, the region split into the present-day countries of Rwanda and Burundi.