English: The Reconstruction Era, a period spanning the early Civil War years until the start of Jim Crow racial segregation in the 1890s, was a time of significant transformation in the United States, as the Nation grappled with the challenge of integrating millions of newly freed African Americans into its social, political, and economic life. It was in many ways the Nation’s Second Founding, as Americans abolished slavery and struggled earnestly, if not always successfully, to build a nation of free and equal citizens. During Reconstruction, Congress passed the Thirteenth, Fourteenth, and Fifteenth constitutional amendments that abolished slavery, guaranteed due process and equal protection under the law, and gave all males the ability to vote by prohibiting voter discrimination based on race, color, or previous condi- tion of servitude. Ultimately, the unmet promises of Reconstruction led to the modern civil rights movement a century later.