At the end of WWI, Belgium accepted the League of Nations Mandate of 1916 to govern Rwanda as one of the two kingdoms making up the territory Ruanda-Urundi, along with its existing Congo colony to the west. The portion of the German territory, never a part of the Kingdom of Rwanda, was stripped from the colony and attached to Tanganyika mandate. A colonial military campaign from 1923 to 1925 brought the small independent kingdoms to the west, such as Kingogo, Bushiru, Bukunzi and Busozo, under the power of the central Rwandan court.