Dec. 24, 1865
Months after the fall of the Confederacy and the end of slavery, a half dozen veterans of the Confederate Army formed a private social club in Pulaski, Tennessee, called the Ku Klux Klan. The KKK soon became a terrorist organization, brutalizing and killing Black Americans, immigrants, sympathetic whites and others.
While the first wave of the KKK operated in the South through the 1870s, the second wave spread throughout the U.S., adding Catholics, Jews and others to their enemies’ list. Membership rose to 4 million or so.
The KKK returned again in the 1950s and 1960s, this time in opposition to the civil rights movement. Despite the history of violence by this organization, the federal government has yet to declare the KKK a terrorist organization.