Trust Territory of the Pacific Islands
The Trust Territory of the Pacific Islands (TTPI) was a United Nations trust territory in Micronesia administered by the United States from 1947 to 1994. The Imperial Japanese South Seas Mandate had been seized by the US during the Pacific War, as Japan had administered the territory since the League of Nations gave Japan a mandate over the area from Imperial Germany after World War I. However, in the 1930s, Japan left the League of Nations and invaded additional lands.
Source: Wikipedia — Trust Territory of the Pacific Islands (CC BY-SA 4.0)