The Lewis and Clark Expedition
(1804–1806) was a federally funded venture to explore the North American West. The
expedition's principal objective was to survey the Missouri and Columbia rivers,
locating routes that would connect the continental interior to the Pacific Ocean. The
Louisiana Purchase of
1803, in which the United States acquired some 828,000 square miles of land west of
the Mississippi River, facilitated the mission, allowing the explorers. . .
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