The construction of the Transcontinental Railroad in the U.S., completed in 1869, was notable for connecting the eastern and western parts of the country, facilitating trade, travel, and communication. It was a monumental engineering achievement, involving the collaboration of multiple railroad companies, laborers (including immigrants), and significant government support. The railroad accelerated westward expansion, promoted economic growth, and contributed to the settlement of the American West. However, it also had severe consequences for Indigenous communities and the environment, leading to dislocation and cultural erosion for Native Americans.