 Prior to Operation Barbarossa, the OUN actively cooperated with Nazi Germany.According to the National Academy of Sciences of Ukraine and other sources, OUN-B leader Stepan Bandera held meetings with the heads of Germany's intelligence, regarding the formation of "Nachtigall" and "Roland" Battalions.On February 25, 1941, the head of the Abwehr, Wilhelm Franz Canaris, sanctioned the creation of the "Ukrainian Legion" under German command.