On 24 April 1915, the Unionist able arrested the Armenian elite of the capital, by the same token formalising its genocidal plan. Implemented during the First World War, that genocide illustrates the inviolable principle that war is Is the first condition of unleashing genocidal violence. The rise to power of the Committee Union and Progress (CUP), in July 1908, certainly above-mentioned great hope among the groups persecuted under the Ancien Regime. but it also promotes the quest for a new model. that of an ethnically homogeneous state, <, the nation-state only way thought the Young Turk leaders to transform (empire into a modern state, centralizes. The project manager however contained the latent idea of excluding groups regarded as unassimilable. The successive territorial losses, culminating with the humiliating defeat registered during the Balkan wars (1912-1913), have changes the equilibria in the Central Committee of the CUP, whose most members radicals took control them.The boycott campaigns, in 1912-1913, by the authorities against companies and businesses run by Greeks and Armenians, scans have the latest illusions of these and instills within the Muslim public opinion (the image of the "traitor" Greek or Armenian. This process of stigmatization, inspirered by the Old Regime, has undeniably prepare public opinion that perpetration of the genocide as a legitimate " punishment "inflicted Greeks, Syriacs and Armenians.