What caused renewed fighting between Americans and western Indians during the 1860s?

Answer 1

Renewed fighting between Americans and western Indians during the 1860s was primarily caused by the westward expansion of settlers and the U.S. government’s push for land, spurred by the Gold Rush and the demand for resources. The discovery of gold in places like Colorado and the establishment of railroads encroached on Native American territories, leading to increased tensions. Additionally, broken treaties and the U.S. military's aggressive campaigns further escalated conflicts as tribes sought to defend their homelands against encroachment. These factors culminated in a series of violent confrontations throughout the decade.