the Soviets and the Polish communists. Ukrainian The Ukrainian Insurgent Army (, Ukrayins’ka Povstans’ka Armiya; UPA) was a Ukrainian nationalist paramilitary and later partisan army that engaged in a series of guerrilla conflicts during World War II against Nazi Germany, the Soviet Union, Czechoslovakia, and both Underground and Communist Poland. The group was the military wing of the Organization of Ukrainian Nationalists—Bandera faction (the OUN-B), originally formed in Volyn in the spring and summer of 1943. Its official date of creation is 14 October 1942, day of Intercession of the Theotokos feast. The OUN's stated immediate goal was the re-establishment of a united, independent national state on Ukrainian ethnic territory. Violence was accepted as a political tool against foreign as well as domestic enemies of their cause, which was to be achieved by a national revolution led by a dictatorship that would drive out the occupying powers and set up a government representing all regions and social groups. The organization began as a resistance group and developed into a guerrilla army. During its existence, the Ukrainian Insurgent Army fought against the Poles and the Soviets as their primary opponents, although the organization also fought against the Germans starting from February 1943. From late spring 1944, the UPA and Organization of Ukrainian Nationalists-B (OUN-B)—faced with Soviet advances—also cooperated in limited instances with German forces and Soviet forces against the invading Germans, Soviets, and Poles in the hope of creating an independent Ukrainian state. In response to the ethnic cleansing of Ukrainian civilians by Polish nationalists, the UPA likewise committed ethnic cleansing of the Polish population of Volhynia and East Galicia. Soviet Soviet partisans during World War II, especially those active in Belarus, effectively harassed German troops and significantly hampered their operations in the region. As a result, Soviet authority was re-established deep inside the German-held territories. In some areas partisan collective farms raised crops and livestock to produce food. However this was not usually the case and partisans also requisitioned supplies from the local populace, sometimes involuntarily. Soviet partisans in Finland were known to have attacked villages and indiscriminately targeted the populace, killing entire families. The war crimes committed in Finland by Soviet partisans were investigated by the National Bureau since 1999. However, Russia refused access to Soviet archives and the investigation ended in 2003. Partisan warfare was routinely distorted in the Soviet Union. According to historian Veikko Erkkilä the Russian