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Thomas Jefferson sends a secret message asking if they could explore the west and fund it as well.
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Lewis was chosen as commander and wrote a letter to clark and asked him to join him.
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The Louisiana purchase was announced that Lewis will explore the land along with Clark.
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Lewis contructs a keelboat and picks up clark and other recruits and heads down the Ohio River.
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Lewis and Clark establish Camp Wood, on the Wood River in Illinois up stream from st louis.
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The Corps of Discovery leaves Camp Wood and begins its journey up the Missouri River.
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Expedition marks first 4th of July west of the Mississippi by firing the keelboat's cannon after they fired the cannon they named it the Independence Creek.
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Sgt. Charles Floyde dies because his apendex bursted. Where they buried him it was named Floyd's Bluff and a near by stream Floyd's river.
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All of the men try to drown a prarie dog out of its hole to send back to jefferson,
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The men discover earthlodge villages of the Mandan and Hidatsas Indians. Then they build Fort Mandan across the river from the main village.
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A French Canadian fur trapper living with the Hidatsas, is hired as an interpreter. His wife, Sacagawea, a Shoshone who had been captured by the Hidatsas and sold to Charbonneau, is also considered helpful .
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The Corps kill their first grizzly bear near the Yellowstone River in Montana.
