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The Corps Discovery left St. Louis
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The Corps of Discovery holds the first official council between representatives of the United States and the Oto and Missouri Indians at Council Bluffs, Iowa. They hand out peace medals, 15-star flags and other gifts, parade men and show off technology.
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Pvt. Joseph Field kills first bison.
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A friendly council with the Yankton Sioux held. According to a legend, Lewis wraps a newborn baby in a United States flag and declares him "an American."
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Entered present day state of Montana.
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A council meets with the Shoshone, during which Sacagawea learns the fate of her family and reveals that Cameahwait is her brother. Lewis and Clark successfully negotiate for horses for passage over the Rocky Mountains. They buy 29 horses for packing or e
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Clark wrote in his journal, “Ocian [ocean] in view! O! the joy.”
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The Blackfeet Indians try to steal Lewis's group's rifles. A fight broke out and two Indians were killed. This is the only hostile encounter with an Indian tribe.
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The Corps arrives in St. Louis, ending their journey after two years, four months, and ten days.