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Events on Monday 14 May 1804 1
1804Lewis and Clark Expedition DepartsThe Corps of Discovery sets out from St. Louis to explore the American WestOn 14 May 1804, Meriwether Lewis and William Clark led the Corps of Discovery up the Missouri River from near St. Louis, beginning a journey to explore the Louisiana Purchase territory and seek a route to the Pacific. The expedition mapped vast stretches of previously uncharted land and established relations with numerous Native American nations.