Both sultanates also maintained written records of their activities, which still exist. In late 1888, Sultan Yusuf Ali Kenadid entered into a treaty with the Italian government, making his Sultanate of Hobyo an Italian protectorate known as Italian Somalia. His rival Boqor Osman Mahamuud was to sign a similar agreement vis-a-vis his own Majeerteen Sultanate the following year. In signing the agreements, both rulers also hoped to exploit the rival objectives of the European imperial powers so as to more effectively assure the continued independence of their territories. The Italians, for their part, were interested in the territories mainly because of its ports specifically Port of Bosaso which could grant them access to the strategically important Suez Canal and the Gulf of Aden. The terms of each treaty specified that Italy was to steer clear of any interference in the Sultanates' respective administrations. In return for Italian arms and an annual subsidy, the Sultans conceded to a minimum of oversight and economic concessions. The Italians also agreed to dispatch a few ambassadors to promote both the Sultanates' and their own interests. The new protectorates were thereafter managed by Vincenzo Filonardi through a chartered company. An Anglo-Italian border protocol was later signed on 5 May 1894, followed by an agreement in 1906 between Cavalier Pestalozza and General Swaine acknowledging that Baran fell under the Majeerteen Sultanate's administration. With the gradual extension into northern Somalia of Italian colonial rule, both Kingdoms were eventually annexed in the early 20th century. 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. Following World War II, Britain retained control of both British Somaliland and Italian Somalia as protectorates. In 1945, during the Potsdam Conference, the United Nations granted Italy trusteeship of Italian Somalia, but only under close supervision and on the condition — first proposed by the Somali Youth League (SYL) and other nascent Somali political organizations, such as Hizbia Digil Mirifle Somali (HDMS) and the Somali National League (SNL) — that Somalia achieve independence within ten years.Gates, Henry Louis, Africana: The Encyclopedia of the African and African American Experience, (Oxford University Press: 1999), p.1749 British Somalia remained a protectorate of Britain until 1960. To the extent that Italy held the territory by UN mandate, the trusteeship provisions gave the Somalis the opportunity to gain experience in political education and