In 1803, Captains Meriwether Lewis and William Clark began a westward journey that would transform America. Their mission was to head up the Missouri River and find a route through the uncharted west to the Pacific Ocean. The journey was full of risk. But no danger loomed larger in their minds than the Sioux – the powerful Native American confederacy of the plains. And it wouldn't be long before the two crossed paths.See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.