Trust Territories were the successors of the remaining League of Nations mandates and came into being when the League of Nations ceased to exist in 1946. All of the trust territories were administered through the UN Trusteeship Council. The one territory not turned over was South West Africa, which South Africa insisted remained under the League of Nations Mandate, and which eventually gained independence in 1990 as Namibia. The main objection was that the trust territory guidelines required that the lands be prepared for independence and majority rule.
Cameroun (France) and Cameroons (United Kingdom): The French portion achieved independence as the Republic of Cameroon in 1960. The somewhat smaller British portion had been administered in two parts (Northern Cameroons and Southern Cameroons). Following a plebiscite, Northern Cameroons became part of Nigeria in May 1961 and Southern Cameroons joined the Republic of Cameroon in October 1961.
New Guinea (Australia): The north-eastern section of this island had been a League of Nations mandate, the south-eastern section had been Australian before World War I; after World War II, the two were combined into a unified entity for administrative purposes, although the legal distinction between the Territory of Papua and the Territory of New Guinea was maintained. In 1975, the two entities were legally unified and granted independence as Papua New Guinea. The western half of the island, formerly Dutch and now part of Indonesia, was never part of either territory.
Tanganyika (United Kingdom): Granted independence in 1961. Federated with the former British (originally shortly German) protectorate Zanzibar in 1964 to form Tanzania.
Libya (Tripolitania and Cyrenaica administered by United Kingdom; Fezzan administered by France since 1946, cfr. Resident) till its independence as United Libyan Kingdom on 24 December 1951; only on 10 December 1949 a UN Commissioner was appointed for all Libya, Adrian Pelt (Netherlands; arrived in Tripoli 18 January 1950) to supervise the transition to independence as a single monarchy.
