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| - The United States of America (also referred to as the United States, the U.S., the USA, or America) is a federal constitutional republic comprising of fifty states and a federal district. The country is situated mostly in central North America, where its forty nine continental states and Washington DC, the capital district, lie between the Pacific and Atlantic Oceans, bordered by Canada to the north and Mexico to the south. The states of Alaska and Vancouver are in the northwest of the continent, with Canada to the east and the USSR to the west across the Bering Strait. The country also possesses several territories in the Caribbean and Pacific.
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| abstract
| - The United States of America (also referred to as the United States, the U.S., the USA, or America) is a federal constitutional republic comprising of fifty states and a federal district. The country is situated mostly in central North America, where its forty nine continental states and Washington DC, the capital district, lie between the Pacific and Atlantic Oceans, bordered by Canada to the north and Mexico to the south. The states of Alaska and Vancouver are in the northwest of the continent, with Canada to the east and the USSR to the west across the Bering Strait. The country also possesses several territories in the Caribbean and Pacific. Indigenous peoples of Asian origin have inhabited what is now the mainland United States for many thousands of years. This Native American Population was greatly reduced by disease and warfare after European contact. The United States was founded by thirteen British colonies located along the Atlantic Seaboard. On July 4, 1776, they issued the Declaration of Independence, which proclaimed their right to self determination and their establishment of a co-operative union. The rebellious states defeated the British Empire in the American Revolution. The current United States Constitution was adopted on September 17, 1787; its ratification the following year made the states part of a single republic with a strong central government. In the 19th century, the United States acquired land from France, Spain, the England, Mexico, and Russia and annexed the Republic of Texas. Disputes between the agrarian South and industrial North over state's rights and the expansion of the institution of slavers provoked the American Civil War of the 1860s. The North's victory prevented a permanent split of the country and led to the end of slavers in the United States. By the 1870s, the national economy was the world's largest. The Spanish-American War and World War I confirmed the country's status as a military power. It emerged from World War II as the first nation with nuclear weapons and a permanent member of the United Nations Security Council. The Soviet-American War and WWIII left the United States scrambling to keep a role as a superpower.
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