~
"At the time of Ulysses S. Grant's election to the presidency, white supremacists were conducting a reign of terror throughout the South. In outright defiance of the Republican-led federal government, Southern Democrats formed organizations that violently intimidated blacks and Republicans who tried to win political power.
The most prominent of these, the Ku Klux Klan, was formed in Pulaski, Tennessee, in 1865. Originally founded as a social club for former Confederate soldiers, the Klan evolved into a terrorist organization. It would be responsible for thousands of deaths, and would help to weaken the political power of Southern blacks and Republicans."
https://www.pbs.org/wgbh/americanexperience/features/grant-kkk/