Paleoindians migrated from Asia to what is now the continental United States about 15,000 years ago. The greatly reduced descendant population and isolated Native American by European contact, primarily a disease brought by explorers and traders. European colonization occurred, began about 1600, chiefly from England. United States emerged from the British colonies 13 located along the Atlantic Coast, and developed economies and democratic political systems. Nationalists protested in the British incursions in tax policy is that Americans of their rights, which led to war in 1775. On July 4, 1776, delegates from 13 countries to the Continental Congress passed unanimously on the Declaration of Independence, which established the United States of America. New state, in alliance with France and Britain defeated in the American Revolution [7] and was the first successful war against the independence European empire [8] and adopted the current Constitution of the United States on September 17, 1787;. Ratification presented in the following year in the U.S. part of the Republic and one with a stronger central government. The ratification of the Bill of Rights, comprising ten constitutional amendments to ensure a lot of basic civil rights and freedoms, in 1791.
A "second war of independence" in the War of 1812 secured claims against the United States of the British Empire and ensure the safety of Canadian territory. United States embarked on a strong expansion in North America during the 19th century. Offset by local tribes, and get on the territory of Louisiana from France, Florida from Spain; annexation of the Republic of Texas in 1845, which led to the war, which occupied a large area of Mexico, bought Alaska from Russia in 1867. Through regional expansion in the early, led significant differences between the South agricultural slaves Holding and industrial North to the American Civil War. Re-establish North Korea's victory Union, leading to the ratification of the Thirteenth Amendment to the Constitution of the United States and an end to legalized slavery in the United States. Transfer Indian wars of the Plains tribes remaining confined to reservations, the decision of Congress annexed the Republic of Hawaii, then the treaty ending the Spanish-American War abandoned Puerto Rico, Guam and the Philippines as well as in (which became later Independent). By the end of the nineteenth century, the U.S. national economy was the largest in the world. [9]
Spanish-American War and World War I confirmed the status of the country as a global military power. United States emerged from World War II to be the first country to possess nuclear weapons, and a permanent member of the Security Council of the United Nations. Left end of the Cold War and the disintegration of the Soviet Union and the United States as the sole superpower. The U.S. economy is the world's largest economy and national, with GDP 2011 an estimated 15.1 trillion (22% of world GDP in nominal and more than 19% of global GDP in purchasing power parity). [3] [10] per capita income is the world's sixth highest. [3] State accounts for 41% of global military spending, [11] and a leading force of economic, political, and cultural rights in the world. [12] [13]
