US Clark's Expedition: Lewis And Clark Expedition

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The lands included in the Louisiana Purchase were those west of the Mississippi River but they were largely unexplored and therefore completely unknown to both the U.S. and France at the time. Because of this, shortly after the purchase of the land President Jefferson requested that Congress approve $2,500 for an exploratory expedition west.

Once Congress approved the funds for the expedition, President Jefferson chose Captain Meriwether Lewis as its leader. Lewis was chosen mainly because he already had some knowledge of the west and was an experienced Army officer. After making further arrangements for the expedition, Lewis decided he wanted a co-captain and selected another Army officer, William Clark.

The goals of this expedition, as outlined by President Jefferson, were to study the Native American tribes living in the area as well as the plants, animals, geology and terrain of the region. The expedition was also to be a diplomatic one and aid in transferring power over the lands and the people living on them from the French and Spanish to the United States. In addition, President Jefferson wanted the expedition to find a direct waterway to the West Coast and the Pacific Ocean so westward expansion and commerce would be easier to achieve in the coming years.

The Expedition

Lewis and Clark's expedition officially began on May 21, 1804 when they and the 33 other men making up the Corps of Discovery departed from their camp near St. Louis, Missouri. The first portion of the expedition followed the route of the Missouri River during which, they passed through places such as present-day Kansas City, Missouri and Omaha, Nebraska.
On August 20, 1804, the Corps experienced its first and only casualty when Sergeant Charles Floyd d...

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...ed to St. Louis on September 23, 1806.

Achievements of the Lewis and Clark Expedition

Although Lewis and Clark did not find a direct waterway from the Mississippi River to the Pacific Ocean, their expedition brought a wealth of knowledge about the newly purchased lands in the west. For example, the expedition provided extensive facts on the Northwest's natural resources. Lewis and Clark were able to document over 100 animal species and over 170 plants. They also brought back information on the size, minerals and the geology of the area.
In addition, the expedition established relations with the Native Americans in the region, one of President Jefferson's main goals. Aside from the confrontation with the Teton Sioux, these relations were largely peaceful and the Corps received extensive help from the various tribes they met regarding things like food and navigation.

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