This unit focuses on how the United States transforms itself from a mostly rural, agricultural society to an urban, industrial one.  Farmers, miners, and ranchers settle all regions of the West costing Native Americans their land.  Large businesses begin to dominate the economy.  Providing much of the labor for these huge new concerns are millions of immigrants who stream to the major cities of the North and East.  New manufacturing and selling techniques begin to create mass consumer markets for goods and services.