The Ku Klux Klan (KKK) is a white supremacist hate group that has historically targeted African Americans and other minority groups in the United States. The KKK was founded in 1865 in Tennessee and quickly spread throughout the Southern states in the aftermath of the Civil War.

During the Reconstruction era following the Civil War, the KKK engaged in acts of violence, intimidation, and terrorism against African Americans and their allies who were advocating for civil rights and equality. The Klan used tactics such as lynching, cross burnings, and bombings to instill fear and maintain white supremacy.

The KKK's reign of terror continued well into the 20th century, with the group becoming particularly active during the civil rights movement of the 1950s and 1960s. Members of the KKK were responsible for numerous acts of violence, including the murders of civil rights activists such as Medgar Evers and the bombing of the 16th Street Baptist Church in Birmingham, Alabama, which killed four young Black girls.

Despite legal action and efforts to combat the KKK, the group still exists today, albeit in a more fragmented and decentralized form. The legacy of the Ku Klux Klan serves as a stark reminder of the deep-rooted racism and bigotry that has plagued American society and the ongoing struggle for racial equality and justice.