An Irish historian RM Douglas has written a new book on the ethnic cleansing (there's no other word) of German minorities from central and eastern Europe in 1945. Interview with him here on the New Books network.
R. M. Douglas, “Orderly and Humane: The Expulsion of the Germans after the Second World War” (Yale UP, 2012)
What's really chilling is that apparently the western allies (as well as the Soviets) planned this and knew that there would be a humanitarian disaster, but basically didn't care as they thought leaving German minorities in place would lead to more wars in the future.
Now I know a lot people will just say, 'they had it coming' due to what the Germans did in the war, but apparently between 500,000 to 1.5 million people lost their lives in this episode. A dark chapter.
Edit: apparently he also wrote a book on the Irish wartime fascist group Ailteori na hAisergi ('Architects of the Resurrection'). http://counterenlightenment.blogspot...ection-by.html