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The Louisiana Territory was purchased by the U.S. from france for 15 million dollars. This gave explorers a chance to find out what the U.S. had just bought.
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45 members led by Meriwether Lewis and William Clark went upstream the Missouri River. They have reached the Indian country. They also exolored the Rocky Mountains.
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The Lewis and Clark expidition reached the pacific ocean.
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The Lewis and Clark expiditon returned home to St. Louis.
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Zebulon Pike set out to expolore the new Louisiana Territory & explored Colorado, & spanish terrirory along the Rio Grande and the Red River.