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Thomas Jefferson bought land which was called The Louisiana Purchase on April 6, 1801.
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York was Willaim Clark's slave
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Meriwether Lewis and William Clark started the expedition.
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Meriwether and William found Sacajawea when they were on the expedition and stayed with her through the winter. She has a a husband. She is pregnant.
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The Rocky Mountains was the greatest obstacle of the expedition.
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Sacajawea gave birth to her son Pompy.
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The Lewis and Clark expedition ended when they reached St. Louis, MO.
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The end of the expedition happened on September 23, 1806.
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Meriwether Lewis committed suicide but anyone that knows doesn't know why he did it.
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William Clark died on September 1, 1838.