United States

The [[Cliff Palace The United States of America (USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major self-governing territories, 326 Indian reservations, and some minor possessions. At , it is the world's third- or fourth-largest country by total area., and the United States as fourth-largest at . This figure for the United States is less than the one cited in the ''CIA World Factbook'' because it ''excludes'' coastal and territorial waters.
The ''CIA World Factbook'' lists the United States as the third-largest country (after Russia and Canada) with total area of , and China as fourth-largest at . This figure for the United States is greater than in the ''Encyclopædia Britannica'' because it ''includes'' coastal and territorial waters.|name=largestcountry}} With a population of more than 328 million people, it is the third most populous country in the world. The national capital is Washington, D.C., and the most populous city is New York City.

Paleo-Indians migrated from Siberia to the North American mainland at least 12,000 years ago, and European colonization began in the 16th century. The United States emerged from the thirteen British colonies established along the East Coast. Disputes over taxation and political representation with Great Britain led to the American Revolutionary War (1775–1783), which established independence. In the late 18th century, the U.S. began vigorously expanding across North America, gradually acquiring new territories, frequently displacing Native Americans, and admitting new states; by 1848, the United States spanned the continent. Slavery was legal in the southern United States until the second half of the 19th century when the American Civil War led to its abolition. The Spanish–American War and established the U.S. as a world power, a status confirmed by the outcome of . During the Cold War, the United States and the Soviet Union engaged in various proxy wars but avoided direct military conflict. They also competed in the Space Race, culminating in the 1969 spaceflight that first landed humans on the Moon. The Soviet Union's collapse in 1991 ended the Cold War, leaving the United States as the world's sole superpower.

The United States is a federal republic and a representative democracy with three separate branches of government, including a bicameral legislature. It is a founding member of the United Nations, World Bank, International Monetary Fund, Organization of American States, NATO, and other international organizations. It is a permanent member of the United Nations Security Council. It is one of the most racially and ethnically diverse nations in the world. Considered a melting pot of cultures and ethnicities, its population has been profoundly shaped by centuries of immigration. The U.S. ranks high in international measures of economic freedom, reduced levels of perceived corruption, quality of life, and quality of higher education. Despite receiving relatively high ratings for its human rights record, the country has received some criticism in regard to inequality related to race and income, the use of capital punishment, high incarceration rates and lack of universal health care among other issues.

The United States is a highly developed country, and continuously ranks high in measures of socioeconomic performance. It accounts for approximately a quarter of global GDP and is the world's largest economy by GDP at market exchange rates. By value, the United States is the world's largest importer and the second-largest exporter of goods. Although its population is only 4.2% of the world total, it holds 29.4% of the total wealth in the world, the largest share held by any country. Making up more than a third of global military spending, it is the foremost military power in the world and is a leading political, cultural, and scientific force internationally. Provided by Wikipedia
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Published 2010
Other Authors: ...United States....
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Published 2014
...United States Government Acountability Office --...
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...United States Senate --...
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Published 2016
...United States Government Accountability Office --...
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...United States Government Accountability Office --...
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by Barchers, Suzanne I.
Published 1990
...(United States, Ozarks) --...
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Published 2014
...United States Government Accountability Office --...
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by Ervine, Quintin V.
Published 2009
...United States Government Accountability Office --...
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Published 2010
...United States Government Accountability Office....
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Published 2014
...United States Government Accountability Office --...
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Published 2016
...United States Interagency Council on Homelessness....
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Published 2012
...United States House of Representatives, Committee on Energy and Commerce, Minority Staff --...
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Published 2014
...United States Government Accountability Office --...
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Published 2016
...United States Government Accountability Office....
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Published 2000
...United States Roger Anyon --...
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Published 1950
...by Alexander Hamilton -- The debate in the United States House of Representatives : -- Speculation...
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Published 2010
...United States Government Accountability Office --...
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Published 2009
...United States Government Accountability Office --...
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Published 1925
...United States...
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Published 2009
...United States....
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