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, radical nationalist right-wing groups. The OUN was the largest and one of the most important far-right Ukrainian organizations operating in the interwar period on the territory of the Second Polish Republic. The OUN was mostly active preceding, during, and immediately after the Second World War. The ideology held by the OUN has been characterized by scholars as a Ukrainian form of fascism and/or integral nationalism, itself sometimes characterized as proto-fascist, or more broadly as extreme or radical nationalism influenced by fascist movements. Its ideology was influenced by the writings of Dmytro Dontsov, from 1929 by Italian fascism, and from 1930 by German Nazism. The OUN pursued a strategy of violence, terrorism, and assassinations with the goal of creating an ethnically homogeneous and totalitarian Ukrainian state.