The Blackfeet Nation initially held negative sentiments towards U.S. expansion onto their territories and conflicts occurred due to disagreements about hunting rights and trade. However, later in the 19th century, some prominent Blackfeet leaders established more peaceful relations with U.S. authorities and worked towards resolving tensions to benefit the welfare of their people. It's important to note that historical interactions between Native American nations and the U.S. government were complex and varied, including instances of friendship, conflict, and negotiation.