Black Codes: Laws passed by southern states during Reconstruction that aimed to restrict the rights and freedoms of African Americans.
Ku Klux Klan: A secret society formed by white supremacists in the South after the Civil War, known for using violence and intimidation against African Americans and their supporters.
Compromise of 1877: An informal agreement that resolved the disputed presidential election of 1876, leading to the withdrawal of federal troops from the South, effectively ending Reconstruction.