Mohamed Boudiaf
Ben Bella created a new underground action committee to replace the OS, which had been broken up by the French police in 1950. The new group, the Revolutionary Committee of Unity and Action ("Comité Révolutionnaire d'Unité et d'Action", CRUA), was based in Cairo, where Ben Bella had fled in 1952. Known as the "chefs historiques" (historical chiefs), the group's nine original leaders—Hocine Ait Ahmed, Mohamed Boudiaf, Belkacem Krim, Rabah Bitat, Larbi Ben M'Hidi, Mourad Didouch, Moustafa Ben Boulaid, Mohamed Khider, and Ben Bella—were considered the leaders of the Algerian War of Independence.