 The United Nations created the Trust Territory of the Pacific Islands (TTPI) in 1947.Pohnpei (then including Kusaie), Truk, Yap, Palau, the Marshall Islands and the Northern Mariana Islands, together constituted the TTPI.The United States accepted the role of Trustee of this, the only United Nations Trusteeship to be designated as a "Security Trusteeship", whose ultimate disposition was to be determined by the UN Security Council.