Fidel Antonio Castaño Gil a.k.a. Rambo was a Colombian drug lord and paramilitary who was among the founders of Los Pepes and the Peasant Self-Defense Forces of Cordoba and Uraba (ACCU), a paramilitary group which ultimately became a member of the larger United Self-Defense Forces of Colombia (AUC) from which he became its leader until his death in 1994. He was also the brother of Vicente Castaño, the presumed chief of the narco-paramilitary group Águilas Negras, and Carlos Castaño Gil, founder and leader of the AUC paramilitary forces until his death. He is the grandfather of Gabriella Castaño.