 Nyora kupfuurira kweiyi ndima - Pana February 10, 1941, musangano wehutungamiriri hweOUN wakaitwa muKraków, Poland. Kubvira muna 1939, Andriy Atanasovych Melnyk, muvambi weOUN, akanga aiswa somutungamiriri wayo. Akanga asarudzwa nokuda kwechimiro chake chakanaka zvikuru uye chinoshanda; vatsigiri vake vaiyemura fascism yaMussolini asi vakashurikidza Nazism. Zvisinei, boka duku reOUN rinotsigira chiNazi rakanga risingagutsikani. Yakanga iri pakokorodzano iyi apo kupesana kwakasimbiswa. Iri boka reOUN rinotsigira Nazism rakanga rakaramba kugamuchira Andriy Atanasovych Melnyk somutungamiriri weOUN uye panzvimbo pezvo akatumidza zita rokuti Bandera. Ikoku kwakatungamirira kukuparadzana kweOUN muchirimo cha1941 mumapoka maviri: OUN-B Banderites, avo vakanga vari varwi zvikuru, vaduku uye vakatsigira Bandera, uye OUN-M Melnykites, avo vakanga vakwegura zvikuru uye vane pfungwa dzakawanda. Muna February 1941, mwedzi inoverengeka pamberi pokurwisa kweGermany USSR, Bandera akava mutungamiri Providnyk weboka reOUN-B, kana kuti Banderivtsi. Mwedzi mishanu gare gare, muna July 1941, Bandera amene akasungwa ndokuendeswa kumusasa wevasungwa muGermany. Akaiswa mujeri ikoko kusvikira muna 1944. 