After World War II, some 12 million Germans, 3 million Poles and Ukrainians, and tens of thousands of Hungarians were expelled from their homes and forced to migrate to their supposed countries of origin. Using the latest archival materials from Polish, Ukrainian, Russian, Czechoslovak, German, British, and American archives, the contributors to this book provide a sweeping, detailed account of the turmoil caused by the huge wave of forced migration during the nascent Cold War.