United Nations 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 United Nations Trusteeship Council. The one territory not turned over was South-West Africa, which South Africa insisted remained under the League of Nations Mandate. It 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.