فرحات عباس
During his tenure, Ben Bella encountered political struggles with former leaders of the FLN, including Mohammed Khider, Ferhat Abbas, Mohammed Boudiaf and Hocine Aït Ahmed. Ahmed founded the Front des Forces Socialistes (Socialist Forces Front) (FFS) to confront Ben Bella, and the others joined after being alienated by Ben Bella's dictatorial leadership. In 1963, the FFS called for an armed revolt against the regime. However, it had force only in the Kabylia region, and by the summer of 1964 the revolt was controlled and FFS leaders were arrested.