Based mainly on archival records of the countries that carried out the forced migrations and of the international humanitarian organizations that tried but failed to prevent the disastrous results, is an authoritative and objective account. It examines an aspect of European history that few have wished to confront, exploring how the expulsions were conceived, planned, and executed and how their legacy reverberates throughout central Europe today. The book is an important study of the largest recorded episode of what we now call "ethnic cleansing," and it may also be the most significant untold story of the Second World War.