Reconstruction sought to rebuild the South after the Civil War and integrate freed black slaves into society. There were disagreements over how it should be controlled and how to balance white and black political power. Presidential Reconstruction under Johnson enfranchised ex-Confederates but was resisted by Radical Republicans in Congress who instituted military control over the South and protected black civil rights. Corruption scandals weakened Republican support, and the Compromise of 1877 ended Reconstruction by withdrawing federal troops from the South.