Soviet Union. The battalion was formed of the émigrés and Soviet POWs from the Caucasian republics at Neuhammer in October 1941. Subordinated to the German commando battalion Brandenburgers and placed under the command of Oberleutnant Theodor Oberländer, the unit received training at Neuhammer and Mittenwald (Bavaria) with the Gebirgsjäger. Later a special 130-men-strong Georgian contingent of Abwehr codenamed "Tamara-II" was incorporated into Bergmann. By March 1942, there were five companies of some 300 Germans and 900 Caucasians. In August 1942, Bergmann went to the Eastern Front, where it saw its first action in the North Caucasus campaign in August 1942. The unit engaged in anti-partisan actions in the Mozdok-Nalchik-Mineralnye Vody area and conducted reconnaissance and subversion in the Grozny area. At the end of 1942, Bergmann conducted a successful sortie through the Soviet lines, bringing with them some 300 Red Army defectors, and covered the German retreat from the Caucasus. Bergmann went through a series of engagements with the Soviet partisans and regular forces in the Crimea in February 1943 and was dissolved—like other Ostlegionen units—at the end of 1943. The significantly shrunken ex-Bergmann companies were dispatched to conduct police functions in Greece and Poland. Nachtigall and Roland Battalions The Nachtigall Battalion, officially known as Special Group Nachtigall, and the Roland Battalion, officially known as Special Group Roland, were the subunits under command of the Abwehr special operation unit Brandenburgers (1st Brandenberg Battalion). They were the two military units formed 25 February 1941 by head of the Abwehr Wilhelm Franz Canaris, which sanctioned the creation of the "Ukrainian Legion" under German command. They were manned primarily by occupied Polish citizens of Ukrainian ethnicity directed to unit by Bandera's OUN orders. In May 1941, the German command decided to split a 700-strong Ukrainian Legion into two battalions: Nachtigall ("Nightingale") and Roland Battalion. Training for Nachtigall took place in Neuhammer near Schlessig. On the Ukrainian side, the commander was Roman Shukhevych and on the German, Theodor Oberländer. (Oberländer was later to become Federal Minister for Displaced Persons, Refugees and War Victims in the Federal Republic of Germany.) Ex-Brandenburger Oberleutnant Dr. Hans-Albrecht Herzner was placed in military command of the Battalion. The Nachtigall unit was outfitted in the standard Wehrmacht uniforms. Before entering Lviv, they placed blue and yellow ribbons on their shoulders. In comparison to Nachtigall – which used ordinary Wehrmacht uniform – the Roland Battalion was outfitted in the Czechoslovakian uniform