The document summarizes the political conflict over Reconstruction between President Andrew Johnson and the Republican-led Congress after the Civil War. It describes Johnson's lenient Reconstruction plan, the passage of the 13th and 14th Amendments, the imposition of Black Codes by Southern states, and Congress' increasing radicalization in response to violence against freedmen. This led Congress to take control of Reconstruction away from Johnson and impose military rule over the South until new state constitutions were ratified granting rights to African Americans.