The document discusses the Reconstruction Era and the establishment of segregation in the United States after the Civil War. It describes how Black Codes were implemented after the Civil War to restrict the rights of African Americans, despite the 13th and 15th Amendments guaranteeing freedom and right to vote. It also explains how the 1896 Plessy v. Ferguson Supreme Court decision established the "separate but equal" doctrine allowing racial segregation under Jim Crow laws, though facilities for black Americans were inferior.