The Organisation of Ukrainian Nationalists was a Ukrainian nationalist organization established on February 2, 1929 in Vienna, uniting the Ukrainian Military Organization with smaller, mainly youth, r
Symon Petliura (center) and Colonel Yevhen Konovalets (to Petliura's right) taking the oath of office of the Sich Riflemen training school in Starokostiantyniv, 1919
Yevhen Konovalets, the OUN's leader from 1929 to 1938
The corpse of Bronisław Pieracki on 18 June 1934
Stepan Bandera
The massacres of Poles in Volhynia and Eastern Galicia were carried out in German-occupied Poland by the Ukrainian Insurgent Army, with the support of parts of the local Ukrainian population, against
Polish victims of a massacre committed by the Ukrainian Insurgent Army in the village of Lipniki, Wołyń (Volhynia), 1943
Dmytro Klachkivsky, commander of UPA units in Volhynia, who ordered the genocide of Poles in the region
The Kisielin massacre was a slaughter of Polish worshippers on 11 July 1943 during a Sunday mass.