United States

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File:Star Spangled Banner instrumental.ogg File:"The Star-Spangled Banner" - Choral with band accompaniment - United States Army Field Band.oga

Orthographic projection of the United States
Map of U.S. insular areas
Map of the U.S. Exclusive Economic Zone
The Declaration of Independence
Map of U.S. territorial acquisitions

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 unincorporated territories, 326 Indian reservations, and some minor possessions. The capital is Washington, D.C., and the most populous city is New York City.

History[edit | edit source]

Pre-Columbian Era[edit | edit source]

Before the arrival of Christopher Columbus in 1492, the Americas were inhabited by indigenous peoples. The Mississippian culture was among the most advanced societies in North America.

Colonial Period[edit | edit source]

The first successful English settlement was Jamestown in 1607. The Thirteen Colonies were established along the East Coast, and they declared independence from Great Britain in 1776.

Independence and Expansion[edit | edit source]

The American Revolutionary War (1775-1783) led to independence. The Declaration of Independence was adopted on July 4, 1776. The U.S. Constitution was ratified in 1788, and George Washington became the first president in 1789.

19th Century[edit | edit source]

The 19th century was marked by westward expansion, the Louisiana Purchase, and the American Civil War (1861�1865), which ended slavery.

20th Century[edit | edit source]

The U.S. emerged as a world power after World War I and World War II. The Cold War with the Soviet Union dominated the latter half of the century.

21st Century[edit | edit source]

The U.S. faced challenges such as the September 11 attacks in 2001 and the Great Recession in 2008. It remains a global leader in technology and culture.

Geography[edit | edit source]

The U.S. is the third-largest country by total area. It features diverse geography, including the Rocky Mountains, Great Plains, and Mississippi River. The climate ranges from arctic in Alaska to tropical in Hawaii.

Demographics[edit | edit source]

The U.S. has a population of over 331 million people, making it the third most populous country. It is known for its cultural diversity and is home to numerous ethnic groups.

Government and Politics[edit | edit source]

The U.S. is a federal republic and a representative democracy. The government is divided into three branches: executive, legislative, and judicial. The President is the head of state and government.

Economy[edit | edit source]

The U.S. has a mixed economy and is the world's largest economy by nominal GDP. It is a leader in technology, finance, and consumer goods.

Culture[edit | edit source]

American culture is characterized by a strong emphasis on individualism and innovation. It has a significant influence on global culture, particularly in music, film, and technology.

Gallery[edit | edit source]

Gallery[edit | edit source]

Related pages[edit | edit source]

References[edit | edit source]

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Contributors: Prab R. Tumpati, MD