AP US History
The Early-Mid Nineteenth Century refers to the period from approximately 1820 to 1860 in American history, marked by significant social, economic, and political changes. This era saw the rise of industrialization, urbanization, and a shift in labor systems, transforming the landscape of the nation and paving the way for the Market Revolution. The impact of these changes affected various aspects of life, including transportation, communication, and the economy, ultimately setting the stage for the Civil War and further national developments.