Whereas Ben Bella could count on the support of an overwhelming majority in the National Assembly, an opposition group led by Ait Ahmed soon emerged. Opponents outside the government included the supporters of Messali Hadj, the PCA, and the left-wing Socialist Revolution Party (Parti de la Révolution Socialiste--PRS) led by Boudiaf. The communists, who were excluded from the FLN and therefore from any direct political rule, were particularly influential in the postindependence press. The activities of all these groups were subsequently banned, and Boudiaf was arrested. When opposition from the General Union of Algerian Workers (Union Générale des Travailleurs Algériens--UGTA) was perceived, the trade union organization was subsumed under FLN control.

Contrary to the intent of the Tripoli Program, Ben Bella saw the FLN as an elite vanguard party that would mobilize popular support for government policies and reinforce his increasingly personal leadership of the country. Because Khider envisioned the FLN as playing a more encompassing, advisory role, Ben Bella forced him from office in April 1963 and replaced him as party secretary general. Khider later absconded with the equivalent of US$12 million in party funds into exile in Switzerland. In August 1963, Abbas resigned as assembly president to protest what he termed the FLN's usurpation of the legislature's authority. He was subsequently put under house arrest. A new constitution drawn up under close FLN supervision was approved by nationwide referendum in September, and Ben Bella was confirmed as the party's choice to lead the country for a five-year term. Under the new constitution, Ben Bella as president combined the functions of chief of state and head of government with that of supreme commander of the armed forces. He formed his government without needing legislative approval and was responsible for the definition and direction of its policies. There was no effective institutional check on its powers.

Ait Ahmed quit the National Assembly to protest the increasingly dictatorial tendencies of the regime, which had reduced the functions of the legislature to rubber-stamping presidential directives. The Kabyle leaders also condemned the government for its failure to carry through on reconstruction projects in war-ravaged Kabylie, but Ait Ahmed's aims went beyond rectifying regional complaints. He formed a clandestine resistance movement, the Front of Socialist Forces (Front des Forces Socialistes--FFS), based in the Kabylie and dedicated to overthrowing the Ben Bella regime by force. Late summer 1963 saw sporadic incidents attributed to the FFS and required the movement of regular troops into the Kabylie.

More serious fighting broke out a year later in the Kabylie as well as in the southern Sahara. The insurgent movement was organized by the National Committee for the Defense of the Revolution (Comité National pour la Défense de la Révolution-- CNDR), which joined the remnants of Ait Ahmed's FFS and Boudiaf's PRS with the surviving regional military leaders. Khider was believed to have helped finance the operation. 99a . The army moved quickly and in force to crush the rebellion. Ait Ahmed and Colonel Mohamed Chabaani, a wilaya commander leading insurgents in the Sahara, were captured and sentenced to death in 1965, after a trial in which Khider and Boudiaf were similarly condemned in absentia. Chabaani was executed, but Ait Ahmed's sentence was subsequently commuted to life imprisonment. In 1966 he escaped from prison and fled to Europe where he joined the two other chefs historiques in exile.

As minister of defense, Boumediene had no qualms about sending the army to crush regional uprisings because he felt they posed a threat to the state. However, when Ben Bella attempted to co-opt allies from among some of the same regionalists whom the army had been called out to suppress, tensions increased between Boumediene and Ben Bella. In April 1965, Ben Bella issued orders to local police prefects to report directly to him rather than through normal channels in the Ministry of Interior. The minister, Ahmed Medeghri, one of Boumediene's closest associates in the Oujda Group, resigned his portfolio in protest and was replaced by a Political Bureau loyalist. Ben Bella next sought to remove Abdelaziz Bouteflika, another Boumediene confidant, as minister of foreign affairs and was believed to be planning a direct confrontation with Boumediene to force his ouster. On June 19, however, Boumediene deposed Ben Bella in a military coup d'état that was both swift and bloodless. The ousted president was taken into custody and held incommunicado.

Data as of December 1993