When Sacagawea, the Shoshone chief's daughter, was around twelve years old, she was traded to a French Canadian trapper by an enemy tribe and later became his wife. She accepted an offer to serve as a Shoshone interpreter on the Lewis and Clark expedition in November 1804.
<h3>What was the Lewis and Clark expedition?</h3>
The North American West was the focus of the federally sponsored Lewis and Clark Expedition (1804–1866). The main goal of the mission was to study the Missouri and Columbia rivers in search of rivers that would go from the heart of the continent to the Pacific Ocean.
The mission was made possible by the Louisiana Purchase of 1803, by which the United States bought roughly 828,000 square miles of property west of the Mississippi River. This gave the explorers access to territory that had previously belonged to France and subsequently Spain. President Thomas Jefferson took direct leadership of this project's initial organization and planning and devoted his time, effort, and political support to it.
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