Question:  East Karelian concentration camps were organized by a Finnish military leader who served as commander-in-chief of Finland's defence forces during what war?
Sentence (from "Carl Gustaf Emil Mannerheim"): Mannerheim served as the military leader of the Whites in the Finnish Civil War, Regent of Finland (1918–1919), commander-in-chief of Finland's defence forces during World War II, Marshal of Finland, and the sixth president of Finland (1944–1946).
Relevant evidence: Yes