Former territories and administered areas




Organized incorporated territoriesedit

(All areas that have become U.S. states outside of the Thirteen Colonies)

Unincorporated territoriesedit

  • Corn Islands (1914–1971): leased for 99 years under the Bryan–Chamorro Treaty, but returned to Nicaragua when the treaty was annulled in 1970
  • Line Islands: disputed claim with the United Kingdom. U.S. claim to most of the islands was ceded to Kiribati upon its independence in 1979, but the U.S. retained Kingman Reef, Palmyra Atoll and Jarvis Island
  •  Panama Canal Zone (1903–1979): sovereignty returned to Panama under the Torrijos–Carter Treaties of 1978. The U.S. retained a military base and control of the canal until December 31, 1999.
  • Philippines (1898–1946): military government, 1898–1902; insular government, 1901–1935; commonwealth government, 1935–1942 and 1945–1946 (islands under Japanese occupation, 1942–1945); granted independence on July 4, 1946
  • Phoenix Islands: disputed claim with the United Kingdom; U.S. claim ceded to Kiribati upon its independence in 1979 (Baker and Howland Islands, sometimes considered part of this group, are retained by the U.S.)
  • Quita Sueño Bank (1869–1981): claimed under the Guano Islands Act; claim abandoned in a September 7, 1981 treaty
  • Roncador Bank (1856–1981): claimed under the Guano Islands Act; ceded to Colombia on September 7, 1981 treaty
  • Serrana Bank: claimed under the Guano Islands Act; ceded to Colombia on September 7, 1981 treaty
  • Swan Islands (1863–1972): claimed under the Guano Islands Act; ceded to Honduras in a 1972 treaty

Administered areasedit

  • Cuba (1899–1902, 1906–1909, and 1917-1922)
  • Dominican Republic (1916–1924 and 1965–66)
  • Haiti (1915–1934, 1994-1995)
  • Nanpō Islands and Marcus Island (1945–1968): Occupied after World War II, and returned to Japan by mutual agreement
  • Nicaragua (1912–1933)
  • Panama, 1989-1990
  • Ryukyu Islands, including Okinawa (1952–1972): returned to Japan in an agreement including the Daitō Islands
  •  Trust Territory of the Pacific Islands (1947–1986): U.N. trust territory administered by the U.S.; included the Marshall Islands, the Federated States of Micronesia, and Palau, which are sovereign states (that have entered into a Compact of Free Association with the U.S.), along with the Commonwealth of the Northern Mariana Islands.
  • Veracruz (1914): after the Tampico Affair during the Mexican Revolution

Other zonesedit

  • Participation in the Occupation of the Rhineland (1918–1921)
  • Participation in the Occupation of Constantinople (1918–1923)
  • Participation in the Occupation of Austria-Hungary (1918–1919)
  • Occupation of Greenland in World War II (1941–1945)
  • Occupation of Iceland in World War II (1941–1946); military base retained until 2006.
  • Allied Military Government for Occupied Territories, in Allied-controlled sections of Italy from the July 1943 invasion of Sicily until the September armistice with Italy. AMGOT continued in newly liberated areas of Italy until the end of the war, and also existed in France.citation needed
  • Clipperton Island (1944–1945): occupied territory, returned to France on October 23, 1945.
  • United States Army Military Government in Korea: Occupation south of the 38th parallel from 1945 to 1948.
  • American zones of Allied-occupied Germany (1945–1949)
  • Occupation of Japan (1945–1952) after World War II
  • American occupation zones in Allied-occupied Austria and Vienna (1945–1955)
  • American occupation zone in West Berlin (1945–1990)
  • Free Territory of Trieste (1947–1954): The U.S. co-administered a portion of the territory (between the Kingdom of Italy and the former Kingdom of Yugoslavia) with the United Kingdom.
  • Grenada invasion and occupation (1983)
  • Coalition Provisional Authority (Iraq, 2003–2004)
  • Green Zone, Iraq (March 20, 2003 – December 31, 2008)

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