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Louisiana Purchase - President Thomas Jefferson buys the Louisiana Territory from France for $15 million. This doubles the size of the United States and provides a large area to the west of the country for expansion.
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Lewis and Clark set out St. Louis, Missouri to explore the west of the Mississippi.
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Lewis and Clark reach the Pacific Ocean - Explorers Lewis and Clark map out areas of the Louisiana Purchase and eventually reach the Pacific Ocean.
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Thomas Jefferson ends the slave trade so that no "new"slavescan comme to America from Africa.
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Gold Rush begins - James Marshall discovers gold at Sutter's Mill. Soon word is out and people rush to California to strike it rich.
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James K Polk was 11th American President
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hundreds of thousands of people traveled westward