The defense of Van (Armenian: Վանի հերոսամարտ Vani herosamart) was the armed resistance of the Armenian population of Van against the Ottoman Empire's attempts to massacre the Ottoman Armenian population of the Van Vilayet in the 1915 Armenian genocide. Several contemporaneous observers and later historians have concluded that the Ottoman government deliberately instigated an armed Armenian resistance in the city and then used this insurgency as the main pretext to justify beginning the deportation and slaughter of Armenians throughout the empire. Witness reports agree that the Armenian posture at Van was defensive and an act of resistance to massacre. The self-defense action is frequently cited in Armenian genocide denial literature; it has become "the alpha and omega of the plea of ‘mili