The Ukrainian Insurgent Army was a Ukrainian nationalist paramilitary and partisan formation founded by the Organisation of Ukrainian Nationalists on 14 October 1942. During World War II, it was engaged in guerrilla warfare against the Soviet Union, and both the Polish Underground State and Communist Poland.
World War II-era monument in memory of UPA fighters with inscription "Glory to Ukraine! Glory to the heroes!", in place of the Janowa Dolina massacre, Bazaltove, Ukraine
UPA Commanders left to right: Oleksander Stepchuk, Ivan Klimchak, Nikon Semeniuk 1941–1942
Ukrainian Auxiliary Police battalion photographed in 1942