Hanoi 191208 Wikipedia SyHung2020 United States From Wikipedia, the free encyclopedia For other uses of terms redirecting here, see US (disambiguation), USA (disambiguation), and United States (disambiguation) The United States of America (commonly referred to as the United States, the U.S., the USA, or America) is a federal constitutional republic comprising fifty states and a federal district. The country is situated mostly in central North America, where its forty-eight contiguous states and Washington, D.C., the capital district, lie between the Pacific and Atlantic Oceans, bordered by Canada to the north and Mexico to the south. The state of Alaska is in the northwest of the continent, with Canada to its east and Russia to the west across the Bering Strait. The state of Hawaii is an archipelago in the mid-Pacific. The country also possesses several territories, or insular areas, scattered around the Caribbean and Pacific. At 3.79 million square miles (9.83 million km²) and with about 305 million people, the United States is the third or fourth largest country by total area, and third largest by land area and by population. The United States is one of the world's most ethnically diverse and multicultural nations, the product of large-scale immigration from many countries.[7] The U.S. economy is the largest national economy in the world, with an estimated 2008 gross domestic product (GDP) of US$14.3 trillion (23% of the world total based on nominal GDP and almost 21% at purchasing power parity).[4][8] .. The nation was founded by thirteen colonies of Great Britain located along the Atlantic seaboard. On July 4, 1776, they issued the Declaration of Independence, which proclaimed their independence from Great Britain and their formation of a cooperative union. The rebellious states defeated Great Britain in the American Revolutionary War, the first successful colonial war of independence.[9] A federal convention adopted the current United States Constitution on September 17, 1787; its ratification the following year made the states part of a single republic with a strong central government. The Bill of Rights, comprising ten Research Trang1 Hanoi 191208 Wikipedia SyHung2020 constitutional amendments guaranteeing many fundamental civil rights and freedoms, was ratified in 1791. In the 19th century, the United States acquired land from France, Spain, the United Kingdom, Mexico, and Russia, and annexed the Republic of Texas and the Republic of Hawaii. Disputes between the agrarian South and industrial North over states' rights and the expansion of the institution of slavery 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 legal slavery in the United States. By the 1870s, the national economy was the world's largest.[10] The Spanish– American War and World War I confirmed the country's status as a military power. In 1945, the United States emerged from World War II as the first country with nuclear weapons, a permanent member of the United Nations Security Council, and a founding member of NATO. The end of the Cold War left the United States as the sole superpower. The country accounts for approximately 50% of global military spending and is a leading economic, political, and cultural force in the world.[11] The United States of America (commonly referred to as the United States, the U.S., the USA, or America) is a federal constitutional republic comprising fifty states and a federal district. The country is situated mostly in central North America, where its forty- eight contiguous states and Washington, D.C., the capital district, lie between the Pacific and Atlantic Oceans, bordered by Canada to the north and Mexico to the south. The state of Alaska is in the northwest of the continent, with Canada to its east and Russia to the west across the Bering Strait. The state of Hawaii is an Research Trang2 Hanoi 191208 Wikipedia SyHung2020 archipelago in the mid-Pacific. The country also possesses several territories, or insular areas, scattered around the Caribbean and Pacific. At 3.79 million square miles (9.83 million km²) and with about 305 million people, the United States is the third or fourth largest country by total area, and third largest by land area and by population. The United States is one of the world's most ethnically diverse and multicultural nations, the product of large-scale immigration from many countries.[7] The U.S. economy is the largest national economy in the world, with an estimated 2008 gross domestic product (GDP) of US$14.3 trillion (23% of the world total based on nominal GDP and almost 21% at purchasing power parity).[4][8] The nation was founded by thirteen colonies of Great Britain located along the Atlantic seaboard. On July 4, 1776, they issued the Declaration of Independence, which proclaimed their independence from Great Britain and their formation of a cooperative union. The rebellious states defeated Great Britain in the American Revolutionary War, the first successful colonial war of independence.[9] A federal convention adopted the current United States Constitution on September 17, 1787; its ratification the following year made the states part of a single republic with a strong central government. The Bill of Rights, comprising ten constitutional amendments guaranteeing many fundamental civil rights and freedoms, was ratified in 1791. In the 19th century, the United States acquired land from France, Spain, the United Kingdom, Mexico, and Russia, and annexed the Republic of Texas and the Republic of Hawaii. Disputes between the agrarian South and industrial North over states' rights and the expansion of the institution of slavery 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 legal slavery in the United States. By the 1870s, the national economy was the world's largest.[10] The Spanish–American War and World War I confirmed the country's status as a military power. In 1945, the United States emerged from World War II as the first country with nuclear weapons, a permanent member of the United Nations Security Council, and a founding member of NATO. The end of the Cold War left the United States as the sole superpower. The country accounts for approximately 50% of global military spending and is a leading economic, political, and cultural force in the world.[11] Research Trang3 Hanoi 191208 Wikipedia SyHung2020 Etymology Contents In 1507, Martin Waldseemüller • 1 Etymology produced a world map on which • 2 Geography and environment he named the lands of the • 3 History Western Hemisphere "America" o 3.1 Native Americans and European settlers after the first name of Italian o 3.2 Independence and expansion explorer and cartographer o 3.3 Civil War and industrialization Amerigo Vespucci.[12] The o 3.4 World War I, Great Depression, and World War II former British colonies first o 3.5 Cold War and protest politics used the country's modern name o 3.6 Contemporary era in the Declaration of • 4 Government and elections Independence, which was the o 4.1 Parties, ideology, and politics "unanimous Declaration of the • 5 Geographic divisions thirteen united States of • 6 Foreign relations and military America" adopted by the • 7 Economy "Representatives of the united o 7.1 Income and human development States of America" on July 4, [13] o 7.2 Science and technology 1776. The current name was o 7.3 Transportation finalized on November 15, o 7.4 Energy 1777, when the Second • 8 Demographics Continental Congress adopted o 8.1 Language the Articles of Confederation, o 8.2 Religion the first of which states, "The o 8.3 Education Stile of this Confederacy shall be 'The United States of o 8.4 Health America.'" The short form o 8.5 Crime and law enforcement • 9 Culture United States is also standard. Other common forms include o 9.1 Popular media the U.S., the USA, and America. o 9.2 Literature, philosophy, and the arts Colloquial names include the o 9.3 Food U.S. of A. and the States. 9.4 Sports o Columbia, a once popular name • 10 See also for the United States, was • 11 References derived from Christopher Columbus. It appears in the • 12 External links name "District of Columbia". The standard way to refer to a citizen of the United States is as an American. Though United States is the formal adjective, American and U.S. are the most common adjectives used to refer to the country ("American values," "U.S. forces"). American is rarely used in English to refer to people not connected to the United States.[14] The phrase "the United States" was originally treated as plural—e.g., "the United States are"—including in the Thirteenth Amendment to the United States Constitution, ratified in 1865. It became common to treat it as singular—e.g., "the United States is"—after the end of the Civil War. The singular form is now standard; the plural form is retained in the idiom "these United States."[15] Research Trang4 Hanoi 191208 Wikipedia SyHung2020 Geography and environment Main articles: Geography of the United States, Climate of the United States, and Environment of the United States Topographic map of the contiguous United States The United States is situated almost entirely in the Western Hemisphere: the contiguous United States stretches from the Pacific Ocean on the west to the Atlantic Ocean on the east, with the Gulf of Mexico to the southeast; it is bordered by Canada on the north and Mexico on the south.