United States of America


November 30, 2021

The United States of America (USA), abbreviated to United States (U.S.), or the United States, is a federal republic consisting of 50 states and one territories. Washington, D.C., the capital of all states and states in the Pacific Ocean, is located on the continent of North America, bordered by Canada to the north and Mexico to the south. Alaska, located in the northwest of North America, faces Canada to the east and Russia across the Bering Strait to the west. The United States has overseas territories in the Pacific and Caribbean Seas. Among countries in the world, the United States is the third largest country by total area and the third most populous country. It is one of the most multicultural countries in the world, with mainly whites, blacks, and Asians. There are also many immigrants from all over the world. The U.S. economy has the largest economy in the world, with a nominal gross domestic product of $21,439.4 billion as of 2019. Native Americans, believed to have originated on the Asian continent, have lived for many years on the mainland of the United States today, but have After the colonization of America, war and disease caused a sharp decline in the number of indigenous peoples. The United States was founded from 13 colonies along the Atlantic coast. In May 1775, the 13 states waged a war with Britain, their colony, in May 1775 (the American War of Independence). announced the establishment of The United States, which fought war until 1783, became the first British colony to gain independence through the Treaty of Paris. On September 17, 1787, the Constitutional Convention of Philadelphia adopted the present-day Constitution of the United States of America, and ratified the following year, the states became a single republic with a strong central government. The United States Bill of Rights, ratified in 1791, consists of ten amendments and guarantees many basic civil rights and freedoms. In the 19th century, the United States acquired territories from France, Spain, Britain, Mexico, and Russia, and annexed the Republic of Texas and the Republic of Hawaii. In addition to this, it also acquired territories in the Pacific and Caribbean Seas. The American Civil War broke out in the 1860s as a conflict between the agricultural South and the industrialized North over state rights and the expansion of slavery. The victory of the North prevented a permanent division of the state, and slavery was abolished in the United States. Then, in the 1870s, the US economy developed into the world's largest with accelerated industrialization. With the Spanish-American War and World War I, the United States consolidated its position as a military power. In World War II, the United States became the first to possess nuclear weapons and became a permanent member of the UN Security Council. With the end of the Cold War and the dissolution of the Soviet Union, the United States became the only superpower in the world. The United States accounts for three-fifths of the world's military spending, and is a world leader in politics, economy, culture and military.


In 1507, German cartographer Martin Waldzemüller made a map of the world, who named the lands in the Western Hemisphere "America" ​​after the Italian explorer and cartographer Amerigo Vespucci. The country's present name was first used in the United States Declaration of Independence during the former British colonial era as the "unanimous Declaration of the thirteen United States of America", which was dated July 4, 1776 as "Representative of the United States of America". "enter

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