Final answer:
The Ku Klux Klan was founded in 1866 in Pulaski, Tennessee and later re-founded in 1915 as the Second Ku Klux Klan. Both versions of the Klan were associated with white supremacy and used violence to intimidate and oppress African Americans.
Step-by-step explanation:
The Ku Klux Klan was founded in 1866 in Pulaski, Tennessee as an oath-bound fraternal organization of Confederate veterans. Led by former Confederate General Nathan Bedford Forrest, it quickly evolved into a vigilante terrorist group that targeted African Americans and their white supporters. The Klan was re-founded in 1915 as the Second Ku Klux Klan, which sought to preserve white supremacy and Protestantism in the face of societal changes. The Second Klan gained mainstream support and reached its peak in the 1920s with millions of members across the country.