Noun
trust territory (plural trust territories)
a territory placed under the administration of a state by the United Nations
After World War II, the mandate became a UN trust territory administered by the United Kingdom and France. Source: Internet
On 19 October 1958 France recognized the right of her United Nations trust territory of the Cameroons to choose independence. Source: Internet
Map of the TTPI from 1961 The Trust Territory of the Pacific Islands (TTPI) was a United Nations trust territory in Micronesia (western Pacific ) administered by the United States from 1947 to 1986. Source: Internet