Key term for OCR GCSE History A, used in The USA 1945–1974.
Secretive extremist groups, such as the Ku Klux Klan, that use criminal methods like arson and murder to achieve political goals outside the law.
Illegal organisations appears in OCR GCSE History A revision content for Non-British Depth Studies, especially The USA 1945–1974 and Civil Rights in the USA 1954–1964.
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