Mwambutsa IV Bangiricenge was the penultimate king of Burundi who ruled between 1915 and 1966. He succeeded to the throne on the death of his father Mutaga IV Mbikije. Born while Burundi was under German colonial rule, Mwambutsa's reign mostly coincided with Belgian colonial rule (1916–62). The Belgians retained the monarchs of both Rwanda and Burundi under the policy of indirect rule.

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.