where did lewis and clark's expedition begin
Lewis and Clark Expedition Thirty-three people, including 29 participants in training at the 1803â€“1804 Camp Dubois (Camp Wood) winter staging area, then in the Indiana Territory, were near present-day Wood River, Illinois, on the east bank of the Mississippi. In March 1804, the Spanish in New Mexico learned from U.S. General James Wilkinson, later discovered to be a paid agent of the Spanish crown,[note 1] that the Americans were encroaching on territory claimed by Spain.