During the early to mid-1800s, the United States experienced rapid economic, technological, and population growth that transformed it into a market economy. Key developments included the expansion of commercial farming in the Midwest, the transportation revolution of canals and railroads, the rise of manufacturing in the North, and large-scale immigration. However, this period also saw social tensions emerge between native-born Americans and Catholic immigrants, as well as economic divisions growing between the industrial North and agricultural South. Rapid advances in transportation and communication further integrated the national economy but also exacerbated regional differences leading up to the Civil War.