Disfranchisement after the Reconstruction era
Disfranchisement after the Reconstruction era in the United States, especially in the Southern United States, was a series of laws, new constitutions, and practices that were deliberately used to prevent black citizens from registering to vote and voting. These measures were enacted by the former Confederate states following the end of the Reconstruction era in the late 19th century.
Source: Wikipedia — Disfranchisement after the Reconstruction era (CC BY-SA 4.0)