Нахтигаль
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. The unit would have had 800 persons. Shukhevych became a commander of the Legion from the OUN-B side. OUN expected that the unit would become the core of the future Ukrainian army. In the spring the OUN received 2.5 million marks for subversive activities against the USSR. In spring 1941 the legion was reorganized into three units. One of the units became known as Nachtigall Battalion, a second became the Roland Battalion, and a third was immediately dispatched into the Soviet Union to sabotage the Red Army's rear.