Belgian Congo, French Congo Belge, former colony (coextensive with the present-day Democratic Republic of the Congo) in Africa, ruled by Belgium from 1908 until 1960. It was established by the Belgian parliament to replace the previous, privately owned Congo Free State.

Private European and American corporations invested heavily in the Belgian Congo after World War I. Large plantations (growing cotton, oil palms, coffee, cacao, and rubber) and livestock farms were developed. In the interior, gold, diamonds, copper, tin, cobalt, and zinc were mined; the colony became an important source of uranium for the United States during World War II. 

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