The contermi
-nous, or contiguous, forty-eight states—all the states but Alaska and Hawaii—are also called the continental United States. Some include Alaska in the "continental" states, because, although it is separated from the "lower forty-eight" by Canada, it is part of the North American mainland. All of these terms commonly include the District of Columbia. Hawaii, the fiftieth state, occupies an archipelago in the Pacific Ocean.
The United States also holds several other territories, districts, and possessions, notably the federal district of the District of Columbia—which contains the nation's capital city, Washington—and several overseas insular areas, the most significant of which are American Samoa, Guam, the Northern Mariana Islands, Puerto Rico, and the United States Virgin Islands. Palmyra Atoll is the United States' only incorporated territory; but it is unorganized and uninhabited. The United States Minor Outlying Islands consist of uninhabited islands and atolls in the Pacific and Caribbean Sea. In addition, since 1898, the United States Navy has leased an extensive naval base at Guantanamo Bay, Cuba.
Former U.S. possessions include the Panama Canal Zone, which was a U.S. territory from 1903 until 1979. Additionally, the Philippine Islands were American territory from 1898 until 1935, when the United States established the Commonwealth of the Philippines as a transition between territorial status and full Philippine independence, which occurred in 1946. Because it was part of the United States at the time of World War II, the Philippines is the only independent nation with a memorial pillar at the National World War II Memorial in Washington, DC.
In addition to the actual states and territories of the United States, there are also nations which are associated states of the U.S. The Federated States of Micronesia (since 1986), Palau (since 1994), and the Marshall Islands (since 1986) are associated with the United States under what is known as the Compact of Free Association, giving the states international sovereignty and ultimate control over their territory. However, the governments of those areas have agreed to allow the United States to provide defense and financial assistance. The U.S. also treats these nations uniquely by giving them access to many U.S. domestic programs, including disaster response and recovery and hazard mitigation programs under FEMA. The freely associated states are all dependent on U.S. financial assistance to meet both government operational and capital needs. The Office of Insular Affairs administers this financial assistance. The freely associated states also actively participate in all Office of Insular Affairs technical assistance activities. Together with the Commonwealth of the Northern Mariana Islands, each of these associated states were once part of the U.S.-administered UN Trust Territory of the Pacific Islands, which existed from 1947 until 1986 in the case of the Marshall Islands, the Northern Marianas, and the Federated States of Micronesia; Palau's trusteeship ended in 1994.
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