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Jefferson requests $2500 from Congress to pay for the costs of the trip.
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Lewis leaves Pittsburgh PA, sailing down the Ohio River towards St. Louis
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Lewis and Clark hire Toussaint Charbonneauand and his wife Sacajawea to join the party as a guide
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Sacagawea gives birth to her son Jean-Baptiste Charbonneau
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The expedition lands at the mouth of the Columbia River, Astoria, Oregon
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The expedition splits into two teams, so Lewis could explore the Marias River .
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The expedition reunite at the confluence of the Yellowstone and Missouri Rivers
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