What is the main idea of the American Indians and the Transcontinental railroad?

The main idea surrounding American Indians and the Transcontinental Railroad is the profound impact the railroad had on Indigenous communities. The construction and expansion of the railroad facilitated westward expansion, leading to the displacement of Native American tribes from their ancestral lands and disrupting their traditional ways of life. Additionally, it intensified conflicts over land and resources, further marginalizing Indigenous populations in the face of settler colonialism. Ultimately, the railroad symbolizes both technological progress and the profound injustices faced by American Indians during this period.