What year did Heinrich Himmler join the unit that used the concept of Wehrbauer to refer to soldiers designated as settlers for the lands conquered during the German invasions of the Soviet Union and Poland?
Schutzstaffel The Schutzstaffel (SS; also stylized as with Armanen runes; ] ; literally "Protection Squadron") was a major paramilitary organization under Adolf Hitler and the Nazi Party (NSDAP) in Nazi Germany, and later throughout German-occupied Europe during World War II. It began with a small guard unit known as the "Saal-Schutz" (Hall-Protection) made up of NSDAP volunteers to provide security for party meetings in Munich. In 1925, Heinrich Himmler joined the unit, which had by then been reformed and given its final name. Under his direction (1929–45), it grew from a small paramilitary formation to one of the most powerful organizations in Nazi Germany. From 1929 until the regime's collapse in 1945, the SS was the foremost agency of security, surveillance, and terror within Germany and German-occupied Europe.
Roland Battalion The 'Roland Battalion (German: "Battalion Ukrainische Gruppe Roland" ), officially known as Special Group Roland, was the subunit under command of the Abwehr special operations unit Lehrregiment "Brandenburg" z.b.V. 800. Along with the Nachtigall Battalion it was one of two military units formed on 25 February 1941 by head of the Abwehr Wilhelm Franz Canaris, which sanctioned the creation of the "Ukrainian Legion" under German command. It was manned primarily by occupied Poland citizens of Ukrainian ethnicity directed to unit by Bandera's OUN orders .