Most famously, in the summer of 1964, three voting rights activists -- James Chaney, Andrew Goodman, and Mickey Schwerner -- were detained by cops and then murdered by Klansmen in Philadelphia, Mississippi.
The next year, during the climactic voting rights protests in Selma, 26-year-old Jimmie Lee Jackson was beaten and shot by Alabama state troopers in February 1965. He died soon after.
A few weeks later, Rev. James Reeb, a Unitarian minister from Boston, was beaten by white supremacists who attacked him and two other clergymen who had come to Selma to support voting rights. Reeb died two days later.
Two weeks after that, four Klansmen murdered Viola Liuzzo, a mother of five from Detroit who had been giving rides to voting rights marchers after the Selma-to-Montgomery march. They chased her in their own car and shot her twice in the head.
In August 1965, Jonathan Daniels, an Episcopalian seminary student from Boston, was arrested along with a Catholic priest for supporting a voting rights campaign in Lowndes County, Alabama.
Almost immediately after their release, Daniels was shot to death by a deputy.
In January 1966, Vernon Dahmer, a well-off grocery store owner, announced on the radio in Hattiesburg that he would pay poll taxes for anyone who wanted to vote but couldn't afford it.
The Klansmen threw jugs of gasoline into his home and set it on fire. As the fire spread, Dahmer fired his gun to scare the Klansmen off and got his wife and kids out of the house.
He finally made it out, but soon died from the severe burns and smoke inhalation.
"I've been active in trying to get people to register to vote," Dahmer told a reporter. "People who don't vote are deadbeats on the state. I figure a man needs to do his own thinking. What happened to us last night can happen to anyone, white or black."