Beginning in the summer of 1955, Diệm launched the "Denounce the Communists" campaign, during which suspected communists and other anti-government elements were arrested, imprisoned, tortured, or executed. He instituted the death penalty against any activity deemed communist in August 1956.
In August and September 1956, the leadership of the FLN guerrillas operating within Algeria (popularly known as "internals") met to organize a formal policy-making body to synchronize the movement's political and military activities. The highest authority of the FLN was vested in the thirty-four member National Council of the Algerian Revolution (Conseil National de la Révolution Algérienne, CNRA), within which the five-man Committee of Coordination and Enforcement (Comité de Coordination et d'Exécution, CCE) formed the executive.
On the night of 10 August 1956, helped by members of Robert Martel's Union française nord-africaine, Achiary planted a bomb at Thèbes Road in the Casbah targeted at the FLN responsible for the June shootings, the explosion killed 73 Algerian.
Having become one of Hollywood's most popular box-office attractions, she starred in a series of successful films during the remainder of the decade, including her BAFTA- and Golden Globe-nominated role as Natasha Rostova in War and Peace (1956), an adaptation of the Tolstoy novel set during the Napoleonic wars, starring Henry Fonda and her husband Mel Ferrer.