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US Territorial Acquisitions
U-S-History.com
2005
1783 Former colonies 892,135 Treaty of Paris of 1783 following military victory 1803 Louisiana Purchase 827,987 Purchased from France for $15 million, including assumed claims 1819 Florida (East and West) 72,101 Purchased from Spain for $5 million in assumed claims under Adams-Onís Treaty 1845 Texas 389,166 Annexation of independent republic 1846 Oregon Territory 286,541 The Oregon Treaty with Great Britain 1848 Mexican Cession 529,189 Purchase from Mexico following military victory; $15 million plus 3.25 million in assumed claims 1853 Gadsden Purchase 29,670 Purchased from Mexico for $10 million 1857 Baker Island,Howland Island,Jarvis Island
.5, .6, 1.7 Unincorporated territory claimed under Guano Act of 1856 1858 Johnston Atoll 1.1 Unincorporated territory annexed under Guano Act of 1856; chemical weapon disposal site 1867 Alaska 591,000 Purchased from Russia for $7.2 million; statehood 1959 1867 Midway Islands 2 Annexation of unoccupied area 1898 Hawaiian Islands 6,450 Annexation of independent republic; statehood 1959 1898 Philippine Islands 115,800 Purchased from Spain following military victory; independent in 1946 1898 Puerto Rico 3,508 Annexed following military victory over Spain 1898 Guam 209 Annexed following military victory over Spain 1899 American Samoa 76 Annexed in settlement with Britain and Germany 1899 Wake Island 3 Annexation of unoccupied area 1903 Panama Canal Zone 553 Leased from Panama for $10 million, plus $250,000 annually; ceded to Panama in 1999 1917 Virgin Islands 136 Purchased from Denmark for $25 million; currently an organized, unincorporated U.S. territory under jurisdiction of Office of Insular Affairs of the Dept. of the Interior 1922 Kingman Reef .4 Annexed 1922; later airline refueling; currently uninhabited; National Wildlife Refuge 1938 Kanton and Enderbury Islands 3.5, 3.0 Joint occupation with Britain; independent as Kiribati in 1979 1947 Mariana Islands 179 United Nations Trust Territory; self-governing as Northern Mariana Islands 1947 Caroline Islands 500 United Nations Trust Territory; 1986 most islands adopt commonwealth status as Federated States of Micronesia 1947 Marshall Islands 70 United Nations Trust Territory; 1979 self-governing; 1986 independent as Republic of the Marshall Islands
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