Meriwether Lewis and William Clark explored the territories gained through the Louisiana Purchase. The Corps of Discovery set out from St. Louis and explored 8,000 miles along the Missouri and Columbia Rivers and reached the Pacific. The expedition returned in 1806.
Meriwether Lewis (1774–1809), a former soldier and personal secretary to President Thomas Jefferson, was sent on an expedition to explore the Louisiana Territory. Lewis was appointed and William Clark led the Corps of Discovery across the country, documenting the terrain, flora, and fauna of the Louisiana territory and making initial contact with American Indian tribes.
William Clark (1770–1838) was the frontiersman and explorer who, with Meriwether Lewis, led the Lewis and Clark Expedition in the Louisiana Territory and Pacific Northwest in 1804–1806. Born in Virginia, Clark joined the militia on the Ohio frontier in 1789 and was commissioned as a lieutenant of infantry in the Army in 1792. Under General Anthony Wayne, Clark took part in the Battle of Fallen Timbers in 1794. He left the military in 1796 and in 1803 was invited by Meriwether Lewis to join him in leading an expedition through the Louisiana...
In this lecture Elliott West, a professor of history at the University of Arkansas, describes how the introduction of Old World phenomena such as guns, horses, and new diseases affected the Native peoples of the New World.