Born in 1934, I distinctly recall a BBC broadcast carrying news of the defeat of the Germans saying that Hitler had sent a message to Stalin asking? / demanding? that after the war those captured would be allowed to return to their homeland.
Young though I was in 1943 I remember thinking this was a strange statement for the defeated to make.
I remember reading that one of Stalin's sons was captured by the Germans and that Hitler offered to exchange him for Field Marshall Von-Paulus (the Field Marshall who surrendered at Stalingrad) . Stalin refused and his son was later killed while trying to escape .