Answer:
Long before the Union victory in 1865, Congress prepared for the many challenges the nation would face at war’s end, particularly the integration of four million newly emancipated African Americans into the political life of the nation, and the readmission to federal representation of former states in rebellion. Congressional Reconstruction included the Thirteenth, Fourteenth, and Fifteenth amendments to the Constitution which extended civil and legal protections to former enslaved people.
Step-by-step explanation: