The Ku Klux Klan is an organization that was founded in 1866. They were a white underground terrorist group, and they wouldn't accept black people as equals. They would dress in white robes to stress their beliefs that they were superior to black people. As a result, many black people decided not to register and vote and just basically kept away from the black areas. They created a wave of terror which included threats of violence, bullying, lynching, and murder to blacks who would not help them.