* Economic: The United States was expanding its territory westward, and there was a desire to explore and exploit the natural resources of the region.
* Political: The United States wanted to strengthen its claim to the Oregon Country, which was disputed with Great Britain.
* Scientific: There was a desire to learn more about the geography, natural history, and Native American cultures of the region.
Pull factors for Lewis and Clark:
* Adventure: The expedition offered the opportunity for adventure and exploration in uncharted territory.
* Fame: Lewis and Clark knew that they would achieve fame if they were successful in their mission.
* Patriotism: They were motivated by a desire to serve their country and contribute to its growth and prosperity.