Appropriations from Congress funded the exploration of the West. In 1803, President Thomas Jefferson ordered Captain Meriwether Lewis to organize a Corps of Discovery and persuaded Congress to fund this expedition charged with finding a water route to the Pacific Ocean and developing trade with the native tribes. Traveling the Missouri and Columbia Rivers and partially overland to the Pacific, they acquired a wealth of information about the geography, geology, flora, fauna, and peoples of the Northwest. After the purchase of the Louisiana Territory from France later in 1803, the Corp’s mission was also to chart and report on this newly acquired land that doubled the size of our young nation.