The Reconstruction era was a period in United States history following the American Civil War, dominated by the legal, social, and political challenges of abolishing slavery and reintegrating the former Confederate States of America into the United States. During this period, three amendments were added to the United States Constitution to grant equal civil rights to the newly freed slaves. Despite this, former Confederate states often used poll taxes, literacy tests, and intimidation to control people of color.

The history of the lands that became the United States began with the arrival of the first people in the Americas around 15,000 BC. Numerous indigenous cultures formed, and many saw transformations in the 16th century away from more densely populated lifestyles and towards reorganized polities elsewhere. The European colonization of the Americas began in the late 15th century, although most colonies in what would later become the United States were settled after the year 1600.