How did congress respond to the black codes and other southern state actions of 1865 and 1866?

Definition and Summary: The Black Codes were a series of statutes and laws enacted in 1865 and 1866 by the legislatures of the Southern states of Mississippi, Alabama, Georgia, Louisiana, Virginia, Florida, Tennessee, and North Carolina following the end of the Civil War at the beginning of the Reconstruction Era. The Black Codes were created to restrict the freedom of ex-slaves in the South. 

Black Codes
Andrew Johnson was the 17th American President who served in office from April 15, 1865 to March 4, 18 69. One of the important events during his presidency was the Black Codes during the Reconstruction Era following the Civil War.