The Teton Sioux, also known as the Lakota Sioux, had mixed reactions to the Corps of Discovery entering their territory. Some members of the tribe were initially curious and welcoming towards the explorers, while others were suspicious and wary of their intentions. As the expedition continued, tensions grew between the Teton Sioux and the Corps of Discovery, leading to several confrontations and misunderstandings. Ultimately, the relationship between the two groups deteriorated, with the Teton Sioux becoming increasingly hostile towards the explorers.
