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.

The Congo Free State, also known as the Independent State of the Congo, was a large state and absolute monarchy in Central Africa from 1885 to 1908. It was privately owned by King Leopold II, the constitutional monarch of the Kingdom of Belgium. In legal terms, the two separate nations were in a personal union. The Congo Free State was not a part of, nor did it belong to Belgium. Leopold was able to seize the region by convincing other European states at the Berlin Conference on Africa that he was involved in humanitarian and philanthropic work and would not tax trade. Via the International Association of the Congo, he was able to lay claim to most of the Congo Basin. On 29 May 1885, after the closure of the Berlin Conference, the king announced that he planned to name his possessions "the Congo Free State", an appellation which was not yet used at the Berlin Conference and which officially replaced "International Association of the Congo" on 1 August 1885. The Free State was privately controlled by Leopold from Brussels; he never visited it.