Auxiliary Corps of the Black Shirts' Action Squads, known as the Black Brigades (Brigate Nere), a Fascist paramilitary groups, organized and run by the Republican Fascist Party (Partito Fascista Repubblicano, PFR) operating in the Italian Social Republic (in northern Italy), during the final years of World War II, and after the signing of the Italian Armistice in 1943.