United Nations Trusteeship Council

The United Nations Trusteeship Council is one of the six principal organs of the United Nations, established to help ensure that trust territories were administered in the best interests of their inhabitants and of international peace and security. The trust territories—most of them former mandates of the League of Nations or territories taken from nations defeated at the end of World War II—have all now attained self-government or independence, either as separate nations or by joining neighbouring independent countries.

Source: Wikipedia — United Nations Trusteeship Council (CC BY-SA 4.0)