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.Listen to American History Tellers on the Wondery App or wherever you get your podcasts. Experience all episodes ad-free and be the first to binge the newest season. Unlock exclusive early access by joining Wondery+ in the Wondery App, Apple Podcasts or Spotify. Start your free trial today by visiting https://wondery.com/links/american-history-tellers/ now. See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.