On May 21, 1804, Lewis and Clark’s Corps of Discovery departed St. Charles on the Missouri River to begin their exploration of the American West. In 1803, Robert Livingston and James Monroe struck “the greatest real estate deal in history” – the Louisiana Purchase. As representatives for President Thomas Jefferson, they purchased a 530-million-acre area for $15 million, or about 3¢ per acre. The 1803 Louisiana Purchase sparked interest in westward expansion. However, little was known about the territory. Shortly after the purchase, President Jefferson convinced Congress to appropriate $2,500 to fund an expedition led by Captain Meriwether Lewis and William Clark. The purpose of the expedition was to find a direct and predictable waterway across the continent for commerce. In addition, the group was to study Indian tribes, botany, and geology in the territory.