On July 26, 1806, Meriwether Lewis and three men from the Corps of Discovery traveled through this area and met eight Blackfeet American Indians near the Two Medicine River Valley. The two groups camped together under the bluffs on the river's south bank, exchanged gifts, talked, and smoked tobacco. At daybreak on July 27, Lewis's party found the Indians attempting to take some of their weapons and horses. In the struggle that followed, one Blackfeet man was killed and another was severely wounded before Lewis's party fled south toward the Missouri River near today's Fort Benton, Montana, and continued to the confluence of the Marias and Missouri Rivers. Blackfeet survivor Wolf Calf later recalled that his group had acted in a friendly way at first, but that one young man took a gun to gain power in his tribe and signaled the others to seize the expedition's weapons, prompting the fight in which Side Hill Calf was killed by Reubin Fields and another young man was shot in the stomach. Another account said Lewis posted a guard that night, then pursued two men trying to drive off his horses, shot one in the stomach as the man turned to fire, and after the clash placed a peace medal around the dead man's neck so that his people would know who the party was. These were the only American Indians injured by the Corps of Discovery during its three-year expedition.