Passed by the Senate on April 8, 1864, and passed by the House on January 31, 1865, the measure was then sent to the states for ratification. The Thirteenth Amendment to the US Constitution officially abolished slavery in the United States on December 6, 1865, when Georgia ratified it. The Amendment paved the way for the Civil Rights Act of 1866, passed to protect the civil rights of persons of African descent born in or brought to the United States. However, the question of freed blacks’ status in the post-war South remained.