By 1899 the Germans placed advisors at the courts of local chiefs. The Germans were preoccupied with fighting uprisings in Tanganyika, especially the Maji Maji war of 1905–1907. On May 14, 1910 the European Convention of Brussels fixed the borders of Uganda, Congo, and German East Africa, which included Tanganyika and Ruanda-Urundi. In 1911, the Germans helped the Tutsi put down a rebellion of Hutu in the northern part of Rwanda who did not wish to submit to central Tutsi control.