OUN leaders Andriy Melnyk (code name Consul I) and Bandera (code name Consul II) both served as agents of the Nazi Germany military intelligence Abwehr Second Department. Their goal was to run diversion activities after Germany's attack on the Soviet Union. This information is part of the testimony that Abwehr Colonel Erwin Stolze gave on 25 December 1945 and submitted to the Nuremberg trials, with a request to be admitted as evidence.
In the spring of 1941, Bandera held meetings with the heads of Germany's intelligence, regarding the formation of "Nachtigall" and "Roland" Battalions. In the spring of that year, the OUN received 2.5 million marks for subversive activities inside the Soviet Union. Gestapo and Abwehr officials protected Bandera's followers, as both organizations intended to use them for their own purposes.
On June 23, 1941, one day after the German attack on the Soviet Union, Bandera sent a letter to Hitler arguing the case for an independent Ukraine. On 30 June 1941, with the arrival of Nazi troops in Ukraine, Bandera and the OUN-B unilaterally declared an independent Ukrainian state ("Act of Renewal of Ukrainian Statehood"). The proclamation pledged a cooperation of the new Ukrainian state with Nazi Germany under the leadership of Hitler with a closing note "Glory to the heroic German army and its Führer, Adolf Hitler". The declaration was accompanied by violent pogroms.
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