How did Black Codes strengthen white Southerners

The Black Codes allowed the white Southerners to legally practice enslavement of the African Americans to a greater degree of intense restrictions on the slaves.

Explanation:

After the American Civil War, the laws named 'Black Codes' were passed in 1865 and 1866 in the southern states of the United States of America. These laws directly addressed the African Americans to be restricted from practising freedom and work as bonded labours for minimal wages.