编辑“美国”（章节）

===Expansion===
With the advent of the war of 1776 against the [[Kingdom of Great Britain (1707–1801)|British Empire]] and afterwards, the fledgling United States expanded westward with Thomas Jefferson (the third in a long line of Presidents) referring to the nation as an "empire of liberty." As Nancy Isenberg elucidates in her book ''White Trash: The 400-Year Untold History of Class in America'': "The Louisiana Territory, as he envisioned it, would encourage agriculture and forestall the growth of manufacturing and urban poverty—that was his formula for liberty. It was not Franklin’s “happy mediocrity” (a compression of classes across an endless stretch of unsettled land), but a nation of farmers large and small. This difference is not nominal: Franklin and Paine used Pennsylvania as their model, while Jefferson saw America’s future—and the contours of its class system—through the prism of Virginia."<ref>{{Citation|author=Nancy Isenberg|year=2016|title=White trash: the 400-year untold history of class in America|publisher=Viking|isbn=9780670785971|lg=http://libgen.rs/book/index.php?md5=858AE1D454C3854355613E1824C318ED|page=92}}</ref>

Around 1800, as the lands further to the west were opened up to the fledgling United States, the young state saw the land as a way to appease its population and strengthen its power in the world. As Nancy Isenberg further explains: "By 1800, one-fifth of the American population had resettled on its 'frontier,' the territory between the Appalachian Mountains and the Mississippi. Effective regulation of this mass migration was well beyond the limited powers of the federal government. Even so, officials understood that the country’s future depended on controlling this vast territory. Financial matters were involved too. Government sale of these lands was needed to reduce the nation’s war debts. Besides, the lands were hardly empty, and the potential for violent conflicts with Native Americans was ever present, as white migrants settled on lands they did not own. National greatness depended as much as anything upon the class of settlers that was advancing into the new territories. Would the West be a dumping ground for a refuse population? Or would the United States profit from its natural bounty and grow as a continental empire more equitably? There was much uncertainty."<ref>{{Citation|author=Nancy Isenberg|year=2016|title=White trash: the 400-year untold history of class in America|publisher=Viking|isbn=9780670785971|lg=http://libgen.rs/book/index.php?md5=858AE1D454C3854355613E1824C318ED|page=110}}</ref>

After the Statesian Revolution, the United States began a genocidal policy of "Indian Removal" to clear the land between the Mississippi River and the Appalachians for settlers. In 1790, most of the settler population lived within 50 miles of the Atlantic Ocean. From 1800 to 1830, the number of white settlers west of the Appalachians grew from 700,000 to 4.5 million. Between 1820 and 1844, the number of Native Americans living east of the Mississippi dropped from 120,000 to under 30,000. President [[Thomas Jefferson]] bought the Louisiana Territory from [[French Republic (1792–1804)|France]] in 1803, doubling the size of the United States and extending the frontier to the Rocky Mountains.<ref name=":5">{{Citation|author=Howard Zinn|year=1980|title=A People's History of the United States|title-url=https://www.howardzinn.org/collection/peoples-history/|chapter=As Long as Grass Grows or Water Runs|page=124–129|pdf=https://files.libcom.org/files/A%20People's%20History%20of%20the%20Unite%20-%20Howard%20Zinn.pdf}}</ref>

Through a series of treaties from 1814 to 1824, settlers took control of most of [[Alabama]] and [[Florida]] as well as parts of [[Georgia (U.S. state)|Georgia]], [[Kentucky]], [[Mississippi]], [[North Carolina]], and [[Tennessee]]. Future president [[Andrew Jackson]] relied on bribery and threats to make native leaders sign these treaties. In 1818, he began raids into [[Governorate of Florida (1783–1821)|Spanish Florida]] and destroyed Seminole villages until [[Kingdom of Spain (1813–1873)|Spain]] surrendered the territory to the United States in 1819.<ref name=":5" />

Presidents Andrew Jackson and [[Martin Van Buren]] forced 70,000 Native Americans to move west across the Mississippi River. Secretary of War [[Lewis Cass]] promised in 1825 that the United States would never try to take indigenous land west of the Mississippi.<ref name=":5" />

By the late 19th century, the native population had been decimated and the survivors were forced into concentration camps. Native children were forced into boarding schools and prevented from speaking their native languages.<ref name=":2" /> Several hundred children died in these schools.<ref>{{News citation|newspaper=CGTN|title=U.S. govt finds burial sites at 53 Native American boarding schools|date=2022-05-13|url=https://news.cgtn.com/news/2022-05-13/U-S-govt-finds-burial-sites-at-53-Native-American-boarding-schools-19ZRXTgFIC4/index.html|archive-url=https://web.archive.org/web/20220513073029/https://news.cgtn.com/news/2022-05-13/U-S-govt-finds-burial-sites-at-53-Native-American-boarding-schools-19ZRXTgFIC4/index.html|archive-date=2022-05-13|retrieved=2022-07-01}}</ref> By 1900, only 190,000 Native Americans in the United States remained alive compared to five million at the beginning of colonization.<ref name=":2" />