The relationship between the Sultanate of Hobyo and Italy soured when Sultan Kenadid refused the Italians' proposal to allow a British contingent of troops to disembark in his Sultanate so that they might then pursue their battle against the Somali religious and nationalist leader Muhammad Abdullah Hassan's Dervish forces. Viewed as too much of a threat, Sultan Kenadid was eventually exiled to Aden in Yemen and then to Eritrea. His son Ali Yusuf Kenadid succeeded him on the throne. In 1924, Governor Cesare Maria De Vecchi adopted a policy of disarmentation of the northern Somali sultanates. Sultan Ali Yusuf Kenadid was thereafter in turn exiled. By November 1927, the forces of Sultan Osman Mahamuud of the Majeerteen Sultanate were also defeated. The Dubats colonial troops and the Zaptié gendarmerie were extensively used by De Vecchi during these military campaigns. However, unlike the southern territories, the northern sultanates were not subject to direct rule due to the earlier treaties they had signed with the Italians.