What country sponsored Lewis and Clark's expedition?

The U.S.A. provided the Lewis and Clark expedition who explored the Louisiana Purchase with the money. Thomas Jefferson (our 3rd president) was the main person who sponsored it. Jefferson had requested $2500 from Congress to pay for the costs of the trip. However that money was used to provide for medicine, gifts for the Native Americans and camp equipment. Jefferson as well as those in the American Philosophical Society would provide minor donations of books, maps, and scientific equipment.