'' A Terrible Revenge '' , subtitled '' The Ethnic Cleansing of the East European Germans , 1944 – 1950 '' is a book written by Cuban-born American lawyer Alfred-Maurice de Zayas , former research fellow at MPG in Heidelberg , Germany . The work is based on a collection of testimonials from German civilians and the Third Reich military personnel ; and devoted to the expulsion of Germans after World War II from states previously occupied by the Nazis . It includes as well selected interviews with British and American politicians who participated at the Potsdam Conference , including Robert Murphy , Geoffrey Harrison ( drafter of article XIII of the Potsdam Protocol ) , and Denis Allen ( drafter of article IX on the provisional post-war borders ) . The book attempts to describe the crimes committed against the German nation by the Soviet Union , Poland , Czechoslovakia , Hungary and Yugoslavia at the end of World War II – as perceived by the expellees themselves and settlers brought in '' Heim ins Reich '' ( Home into the Empire ) from the east
Potsdam Conference
Potsdam Conference
A Terrible Revenge