Why weren't the shoshone friendly at first?

The Shoshone were not initially friendly with European settlers due to a combination of factors, including historical conflicts with other tribes, misunderstandings in communication and cultural differences, and the impact of disease and displacement caused by the arrival of Europeans. These factors contributed to a sense of distrust and fear among the Shoshone towards outsiders, leading to initial unfriendliness towards European settlers. Over time, as interactions evolved and relationships were established, some Shoshone individuals and groups developed more positive relationships with settlers.