Analysis of information sources in references of the Wikipedia article "夜鶯營" in Chinese language version.
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During April-June 1941, Abwehr organized again two new Battalions mostly from adherents of OUN-B : Special group 'Nightingale'" (Sondergruppe 'Nachtigall' ) and Organization 'Roland' [...].
When Germany invaded the Soviet Union, Roland advanced into Southern Bessarabia and Nachtigall crossed into 加利西亚 (东欧) with Army Group South.
