Indirect rule was a system of governance used by imperial powers to control parts of their empires. This was particularly used by colonial empires like the British Empire to control their possessions in Africa and Asia, which was done through pre-existing indigenous power structures. Indirect rule was used by various colonial rulers such as: the French in Algeria and Tunisia, the Dutch in the East Indies, the Portuguese in Angola and Mozambique and the Belgians in Rwanda and Burundi. These dependencies were often called "protectorates" or "trucial states". Through this system, the day-to-day government and administration of both small and large areas were left in the hands of traditional rulers, who gained prestige and the stability and protection afforded by the Pax Britannica. Consequentially done at the cost of losing control of their external affairs, and often of taxation, communications, and other matters. It was usually carried out with a small number of European "advisors" effectively overseeing the government of large numbers of people spread over extensive areas.

Ruanda-Urundi, later Rwanda-Burundi, was a colonial territory, once part of German East Africa, that was occupied by troops from the Belgian Congo during the East African campaign in World War I and was administered by Belgium under military occupation from 1916 to 1922. It was subsequently awarded to Belgium as a Class-B Mandate under the League of Nations in 1922 and became a Trust Territory of the United Nations in the aftermath of World War II and the dissolution of the League. In 1962 Ruanda-Urundi became the two independent states of Rwanda and Burundi.