United States

[[Cliff Palace The United States of America (USA), commonly known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 states and the federal capital district of Washington, D.C. The 48 contiguous states border Canada to the north and Mexico to the south, with the semi-exclavic state of Alaska in the northwest and the archipelagic state of Hawaii in the Pacific Ocean. Indian country includes 574 federally recognized tribes and 326 Indian reservations with tribal sovereignty rights. The U.S. asserts sovereignty over five major island territories and various uninhabited islands.|}}}} It is a megadiverse country, with the world's third-largest land area, the United States is the third-largest country in the world by land area, behind Russia and China. By total area (land and water), it is the third-largest, behind Russia and Canada, if its coastal and territorial water areas are included. However, if only its internal waters are included (bays, sounds, rivers, lakes, and the Great Lakes), the U.S. is the fourth-largest, after Russia, Canada, and China.
Coastal/territorial waters included:
Only internal waters included: |name=largestcountry}} and third-largest population, exceeding 340 million. Its three largest metropolitan areas are New York, Los Angeles, and Chicago, and its three most populous states are California, Texas, and Florida.

Paleo-Indians migrated to North America across the Bering land bridge more than 12,000 years ago, and formed civilizations and societies. Spanish exploration and colonization led to the establishment of Spanish Florida in 1513, the first European colony in what is now the continental United States. French colonization began in 1562, but permanent settlements came later. Subsequent British colonization led to the first settlement of the Thirteen Colonies in Virginia in 1607. Intensive agriculture in the rapidly expanding Southern Colonies encouraged the forced migration of enslaved Africans. Clashes with the British Crown over taxation and political representation sparked the American Revolution, with the Second Continental Congress formally declaring independence on July 4, 1776.

The United States emerged victorious from the 1775–1783 Revolutionary War and expanded westward across North America, dispossessing Native Americans during the Indian Wars. Expansion began when the U.S. signed the 1803 Louisiana Purchase with Napoleonic France. The end of the Mexican–American War saw the acquisition of further territory. As more states were admitted, a North–South division over slavery led to the secession of the Confederate States of America, which fought the Union in the 1861–1865 American Civil War. With the victory and preservation of the United States, slavery was abolished nationally. In the late 19th century the United States established itself as a great power with victory in the Spanish-American War, a status solidified after its involvement in World War I. After Japan's attack on Pearl Harbor in December 1941, the U.S. entered World War II; its aftermath left the U.S. and the Soviet Union as the world's superpowers. During the Cold War, both countries struggled for ideological dominance and international influence. The Soviet Union's collapse and the end of the Cold War in 1991 left the U.S. as the world's sole superpower, with significant geopolitical influence globally.

The U.S. national government is a constitutional presidential republic and liberal democracy with three separate branches: legislative, executive, and judicial. It has a bicameral national legislature composed of the House of Representatives, a lower house based on population, and the Senate, an upper house based on equal representation for each state. The country's Democratic and Republican parties have dominated American politics since the 1850s. Federalism provides substantial autonomy to the 50 states, while American values are based on a democratic political tradition that draws its inspiration from the European Enlightenment movement. A melting pot of many ethnicities and customs, the culture of the United States has been shaped by centuries of immigration, and its soft power influence has a global reach.

One of the world's most developed countries, the U.S. ranks among the highest in economic competitiveness, productivity, innovation, and higher education. The United States accounted for over a quarter of nominal global economic output in 2024, and its economy has been the world's largest by nominal GDP since about 1890. It possesses by far the largest amount of wealth of any country and has the highest disposable household income per capita among OECD countries, though U.S. wealth inequality is higher than in most other developed countries. The U.S. is a member of multiple international organizations and plays a leading role in global political, cultural, economic, and military affairs. Provided by Wikipedia
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  1. 1
    by AMERICA
    Published 1988
    Other Authors: “…AMERICA…”
    Other
  2. 2
    by AMERICA
    Published 1966
    Other Authors: “…AMERICA…”
    Other
  3. 3
    by América Central.
    Published 1958
    “…América Central…”
    Book
  4. 4
    by Moro, América
    Published 1981
    Other Authors: “…Moro, América…”
    Book
  5. 5
    by AMERICA LATINA
    Published 1975
    Other Authors: “…AMERICA LATINA…”
    Other
  6. 6
    by AMERICA REVEALED
    Published 2000
    Other Authors: “…AMERICA REVEALED…”
    Other
  7. 7
    by AMERICA PONTIFICIA
    Published 1991
    Other Authors: “…AMERICA PONTIFICIA…”
    Other
  8. 8
    by SUD AMERICA
    Published 1925
    Other Authors: “…SUD AMERICA…”
    Other
  9. 9
    by Hispanic Society of America
    Published 1938
    “…Hispanic Society of America Library…”
    Book
  10. 10
  11. 11
    by Hispanic Society of America.
    Published 1929
    “…Hispanic Society of America…”
    Book
  12. 12
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  14. 14
    Other Authors: “…LA IGLESIA EN AMERICA: EVANGELIZACION Y AMERICA…”
    Other
  15. 15
    by América Autos (Barcelona)
    Published 1917
    “…América Autos (Barcelona)…”
    Book
  16. 16
    by Reformed Church in America.
    Published 1978
    “…Reformed Church in America. Commission on History…”
    Book
  17. 17
    “…Mariological Society of America. National Convention…”
    Journal
  18. 18
    by America (Grup musical).
    Published 2003
    “…America (Grup musical)…”
    Book
  19. 19
    by Sanchez, America, 1939-
    Published 1991
    Other Authors: “…Sanchez, America, 1939-…”
    Book
  20. 20
    by Casa Amèrica Catalunya.
    Published 2007
    “…Casa Amèrica Catalunya…”
    Book