Lewis and Clark Expedition

Lewis & Clark Expedition
1804-1806

The Adventure Into The West

postmarked in 2010 with three vintage US Bicentennial stamps

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The Lewis and Clark Expedition (1804–1806) was the first overland expedition undertaken by the United States to the Pacific coast and back. The expedition team was headed by the United States Army soldiers Meriwether Lewis and William Clark and assisted by Sacajawea and Toussaint Charbonneau. The expedition's goal was to gain an accurate sense of the resources being exchanged in the Louisiana Purchase. The expedition laid much of the groundwork for the westward expansion of the United States.