The document summarizes the settlement of the American West between 1865 and 1890. It describes how the frontier pushed westward due to the Homestead Act, transcontinental railroad, mining, cattle ranching, and farming. It also discusses the subduing of Native Americans through broken treaties and warfare, which resulted in their confinement to reservations by 1890. The closing of the frontier by 1890 marked the end of an era in American history.