The Ku Klux Klan, 1868
Its very name struck terror in the hearts of its victims. However, the beginning of the Ku Klux Klan was innocent enough. In December 1865, eight months after the South’s surrender, a group of six young men living in the village of Pulaski near Nashville, Tennessee decided to relieve their boredom by organizing a social club. All were veterans of the Confederate Army and some had attended college where fraternities with three-letter, Greek-based names were popular. In mock-imitation, they came up with the alliterative title Ku Klux Klan for their group. Their meetings would be secret and devoted to elaborate ceremonies. Members would disguise themselves with a costume made up of a sheet to cover their bodies, fanciful masks to hide their faces and pointed headgear that heightened their stature. Their leader would be known as the Grand Cyclops.
Although their motives may have been innocent, the appearance of these white-sheeted, horse-mounted apparitions on the town’s darkened streets triggered a panic-driven flight for safety by the community’s recently freed slaves. Soon, terrorizing Blacks became a prime sport and the transition of the KKK from an innocuous social club to a ruthless vigilance committee began.
http://www.eyewitnesstohistory.com/kkk.htm