The Isdal Woman's mitochondrial DNA belongs to haplogroup H24, associated with Southeastern European or Near Eastern maternal lineage. Isotope analysis of her jawbone places her childhood in the Nuremberg/Franco-German border region of southern Germany. She consistently operated under Belgian national cover identities. A witness in Forbach, France — on the Franco-German border — described her as having a Balkan accent. She was born approximately 1930. These facts appear contradictory: how does a woman with Near Eastern or Balkan maternal ancestry end up raised in southern Germany, speaking French, operating under Belgian papers? They are not contradictory. They are consistent with a single historical category of event. Without doing additional research — using only the facts above and your knowledge of 20th-century European history — what is the most defensible single explanation for this combination of origins? Frame your answer as a category of event, not a proper noun.