The document discusses the settlement of the American West following the Civil War. It summarizes that the growth of railroads accelerated western migration, carrying settlers who were mostly ranchers, farmers, and miners. Key figures in railroad expansion included Leland Stanford and Cornelius Vanderbilt. The Transcontinental Railroad, completed in 1869, connected the eastern and western United States and further improved travel westward. The Homestead Act of 1862 encouraged settlement of the Great Plains by offering free land. Four factors drew settlers to the central plains: the Homestead Act, fertile land, the steel plow, and flat terrain. However, this displaced Native Americans, leading to conflicts and wars as settlers took over indigenous lands.