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Louisiana Purchase from France doubles the size of the United States.
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War of 1812 between the United States and the British Empire.
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Missouri Compromise is enacted, addressing the issue of slavery in new territories.
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The Indian Removal Act is signed into law, leading to the forced removal of Native American tribes.
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Texas Declaration of Independence.
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Mexican-American War.
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Compromise of 1850 attempts to settle issues related to slavery.
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Emancipation Proclamation is issued by President Abraham Lincoln.
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American Civil War.
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U.S. Centennial Exhibition in Philadelphia commemorates the nation's 100th anniversary.