German Professor of History at Stuttgart University , Gerhard Hirschfeld , President of the International Committee for the History of the Second World War , in his obituary praised Madajczyk as an " eminent historian , whose scholarly work on 20th Century Polish and European History has been widely acknowledged and respected " and who , through his work , enhanced greatly the understanding of German occupation policies and different experiences of people under Fascist oppression . Hirschfeld referred to Madajczyk 's research on Generalplan Ost and German war plans and the Soviet massacre at Katyn as " milestones of the historiography of the Second World War " . Polish historian Andrzej Friszke described him as a '' great scholar '' whose work on German occupation of Poland is '' fundamental '' . German historian Professor Karl Schlögel from Viadrina European University called Madajczyk a great historian that described the horror of German rule in occupied Poland
Katyn
Katyn massacre
Czesław Madajczyk