 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.The Belgian government continued to rely on the Tutsi power structure for administering the country, although they became more directly involved in extended its interests into education and agricultural supervision.The Belgians introduced cassava, maize and the Irish potato, to try to improve food production for subsistence farmers.