The one League of Nations mandate not succeeded by a trust territory was South West Africa, at South Africa's insistence. South Africa's apartheid regime refused to commit to preparing the territory for independence and majority rule, as required by the trust territory guidelines, among other objections. South-West Africa eventually gained independence in 1990 as Namibia.
Korea: In wartime talks, Franklin D. Roosevelt proposed that Korea be placed under an American–Soviet trust administration. The plan was eclipsed after Roosevelt's death on 12 April 1945, although it was expressed in the December Moscow Conference, and caused considerable civil unrest in Korea.[1]
Italian Libya: Between 1945 and 1947, the Soviet Union made various proposals that Tripolitania be placed under Soviet trusteeship for ten years, or a joint trusteeship with the United Kingdom and the United States, or that Libya as a whole become an Italian trusteeship.[3]
Ryukyu Islands and Bonin Islands: the Treaty of San Francisco included provisions which provided the United States the right to convert its administration over the Ryukyu and Bonin Islands into a trust territory, but it never did so before sovereignty was voluntarily reverted to Japan.[6]
^Gang Man-gil (1994). "한국사 17: 분단구조의 정착 1" ["17 Korean history: the settlement of the division structure 1"], pp. 133–137. 한길사 [Hangilsa], ISBN978-89-356-0086-1
^St John, Ronald Bruce (April 1982). "The Soviet Penetration of Libya". The World Today. 38 (4): 131–138. JSTOR40395373.
^"The United States and the Recognition of Israel: A Chronology". Compiled by Raymond H. Geselbracht from Harry S. Truman and the Founding of Israel (Westport, Connecticut, 1997) by Michael T. Benson. Harry S. Truman Library and Museum. Archived from the original on 31 October 2012. Retrieved 3 August 2014.