APUSH PERIOD 6: Post-Civil War Expansion 1.) Economic opportunities: Mining, farming, cattle industry 2.) Federal government policies: Homestead Act, Pacific Railroad Act 3.) Active . Key Concept Technological advances, large-scale production methods, and the opening of new markets encouraged the rise of industrial capitalism in the United States. Use the space provided to write down specific details that could be used to discuss the key concepts. Key Concept Technological advances, large-scale