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The started at Camp Wood, just outside of St. Louis and started to explore
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Sergeant Charles Floyd dies of natural causes near Sioux City, Iowa; he is the only death among the Corps of Discovery.
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They occurred a tense encounter with the Teton Sioux near present day Pierre, South Dakota; one of the Sioux chiefs waves his men off.
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Lewis and Clark hire French-Canadian fur-trader and his wife, Sacagawea, to act as interpreters on the journey ahead.
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The men finish building Fort Mandan, their winter quarters in present-day North Dakota.
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One of their boats almost flips and Lewis credits Sacagawea with saving their most important possessions.
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They reach a fork in the Missouri and must decide which branch to choose.
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The group arrives at the Shoshone camp, where Sacagawea recognizes the chief as her long-lost brother, Cameahwa
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The adventure reaches the Columbia River, the last waterway to the Pacific Ocean.
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Having reached the Pacific, they vote on where to build their winter quarters.
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After a winter of only 12 days without rain, the men present their fort to the Clatsop Indians and leave for home
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They have found an easier route across the country and reach St. Louis nearly two and a half years of exploration.