Нахтигаль
Prior to Operation Barbarossa, the Bandera's 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 25 February 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. Roman 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 the spring of 1941 the Legion was reorganized into 2 units. One of the units became known as Nachtigall Battalion, a second became the Roland Battalion, and the remainder was immediately dispatched into Soviet Union to sabotage the Red Army's rear.