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3rd President, Thomas Jefferson sends a secret letter to congress asking for $2,500 to fund an exploration to the Pacific Ocean.
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Congress appropriated the funds for the expedition.
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Meriwether Lewis and William Clark lead a group of explores to explore the US and find a water route to the Pacific.
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Lewis and Clark arrived at Great Falls, Montana.
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Lewis and Clark arrived at the Pacific Ocean.
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Lewis and Clark left Fort Clatsop Winter Camp
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Lewis a and Clark returned from their journey