Question: 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?
Sentence (from "Wehrbauer"): Wehrbauer (] , "soldier peasant") was a concept used by the "Schutzstaffel" (SS) of the Nazi Party to refer to soldiers designated as settlers for the lands conquered during the German invasions of the Soviet Union and Poland.
Relevant evidence: Yes