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Lewis and Clark expedition

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A journey made by Meriwether Lewis and William Clark, during the presidency of Thomas Jefferson, to explore the American Northwest, newly purchased from France, and some territories beyond. The expedition started from St. Louis, Missouri, and moved up the Missouri River and down the Columbia River to the Pacific Ocean. The information that Lewis and Clark gathered was of great help in the settlement of the West. (See also Louisiana Purchase.)

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The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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