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The U.S. capital is moved from Philadelphia to Washington, DC.
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Thomas Jefferson is inaugurated as the third president in Washington, DC.
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United States agrees to pay France $15 million for the Louisiana Territory, which extends west from the Mississippi River to the Rocky Mountains and comprises about 830,000 sq mi. As a result, the U.S. nearly doubles in size.
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James Madison is inaugurated as the fourth president.
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U.S. declares war on Britain over British interference with American maritime shipping and westward expansion.
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James Monroe is inaugurated as the fifth president.
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Spain agrees to cede Florida to the United States.
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In an effort to maintain the balance between free and slave states, Maine (formerly part of Massachusetts) is admitted as a free state so that Missouri can be admitted as a slave state; except for Missouri, slavery is prohibited in the Louisiana Purchase lands north of latitude 36°30'.
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John Quincy Adams is inaugurated as the sixth president.
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Andrew Jackson is inaugurated as seventh president.
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President Jackson signs the Indian Removal Act, which authorizes the forced removal of Native Americans living in the eastern part of the country to lands west of the Mississippi River.
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Martin Van Buren is inaugurated as the eighth president.
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William Henry Harrison inaugurated as the ninth president.
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One month after being elected,William Henry Harrison dies and gives the presidency to his vice president,
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James Polk is inaugurated as the 11th president
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Zachary Taylor is inaugurated as the 12th president
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Abraham Lincoln wins the election to be the next president.
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The Civil War was the conflict between the North (the Union) and the South (the Confederacy) over the expansion of slavery into western states and over the preservation of the Union. This war was had a higher fatality rate out of all of the wars fought in America combined. This sad event shaped our government for the better and opened the eyes of Americans to the brutality of slavery.