The Archives Africaines of the Belgian Federal Public Service Foreign Affairs in Brussels contains records related to colonial Congo Free State, Belgian Congo and Ruanda-Urundi, 1885-1962. The archives was transferred in 1960 to the Ministère belge des Affaires étrangères. In 2015 the archives went to the Belgian State Archives, an arrangement expected to continue until 2018. The Archives Africaines includes "the archives of the former Ministry for Colonies, the archives of the Governor-General of the Congo, and the files on former colonial personnel ."

The Force Publique was the military of the Congo Free State and the Belgian Congo from 1877 to 1960. It was established after Belgian Army officers travelled to the Free State to found an armed force in the colony on Leopold II of Belgium's orders. The Force Publique was heavily involved in atrocities in the Congo Free State, and also saw action in the Congo–Arab War, World War I and World War II. It was renamed to the Congolese National Army in July 1960 after Congo gained independence from Belgian colonial rule.