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This was the first Us expedition to the Pacific Coast
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Floyd died from acute appendictis.
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Sakagawea was not the said "guide" of this expedition ,but rather noticed some geological features and helped translate.
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In the winter of 1804-05 the party build Fort Mandan near present day Washborn, North Dakota.
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Lewis and Broughton's 1792 notes and maps find the stratovolcano mountian for navigation.
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Reached where the Missouri Rivers meet Yellowstone.
