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The Louisiana Purchase Treaty is signed by Thomas Jefferosn
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The Expidition West Begins!
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A person on the expidition named Sergeant Floyde dies.
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They discover an earthlodge village made by the Mandan Indians.
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They move in for winter.
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Sacagawea gives birth to a boy.
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Lewis and another hunter kill a giant grizzly bear!
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Lewis discovers the Great Falls
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The expidition reaches the three forks of the Missouri River.
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Lewis and Clark and the others returned to St. Louis.
