The thirteenth amendment put an end to what custom found in some parts of the united states?

Slavery.

                     

Explanation:

The Volstead Act was passed to enforce the 18th amendment, which banned making, selling, and transporting alcoholic drinks.

The purposes of this act were:

Ban intoxicating alcoholic drinks
Regulate making, selling, and transporting of intoxicating alcoholic drinks
To supply alcohol for the use of scientific research and other practices allowed by the law