What are the three white supremacist organizations of the Reconstruction Era?

During the Reconstruction Era, three prominent white supremacist organizations were the Ku Klux Klan (KKK), the White League, and the Red Shirts. The KKK, founded in 1866, sought to restore white supremacy through intimidation and violence against African Americans and their allies. The White League, formed in Louisiana in 1874, aimed to overthrow Reconstruction governments and reestablish white control. The Red Shirts, active in the South, employed similar tactics to undermine Republican rule and suppress black political participation.