<Ul> <Li> Panama Canal Zone (1903--1979) </Li> <Li> The Philippine Islands (1898--1946) </Li> </Ul> <Li> Panama Canal Zone (1903--1979) </Li> <Li> The Philippine Islands (1898--1946) </Li> <P> Additionally, the United States administered the Trust Territory of the Pacific Islands from July 18, 1947 until October 1, 1994 . The trust territory was subsequently divided into four political entities . One, the Northern Mariana Islands, listed above, became an unincorporated U.S. territory, while three--Federated States of Micronesia, Marshall Islands, and Palau--became independent nations . All three have become freely associated with the United States under a Compact of Free Association . </P>

In reference to divisions in the u.s. class structure