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America acquires new territory in the Louisiana Purchase
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Creek Indians are defeated at the Battle of Horseshoe Bend
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Andrew Jackson is elected President
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The Indian Removal Act is passed
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Signing of the Treaty of Guadalupe Hidalgo
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The Kansas-Nebraska Act is signed into effect
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Frederick Jackson Turner reveals "The Significance of the Frontier in American History"
"The Significance of the Frontier in American History" shapes the nation's perception of the unclaimed land to the West.