All protections of African Americans were abandoned afterward, paving the way for Jim Crow.

Later, the history of the Confederacy and the antebellum South was rewritten (The Lost Cause), so that the latter could be lionized.

One reason for this was for southern traitors to assuage their guilt.

The other was to remind African Americans of their place, and that no one would help them if they stepped out of line.

Slavery was a crime against humanity, and no one was held accountable.