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Regarding 1), I think the threshold for inclusion in this article was 50,000 deaths, given that Valentino used that figure in his definition of ""mass killing"". So listing individual episodes of 50 killings would quickly overwhelm this article given Stalin's prolific record. 2) I think that approach you describe is okay. 3) If the expulsion of German civilians from Eastern Europe involved mass killing of a significant number of people, then why not.   "