There was a remarkable show on German TV the last two evenings. It was the story of aristocratic German family in East Prussia that had to flee, along with their indentured servants, among whom there were several French prisoners, from the approaching Russian armies in 1945. I had read an account by another person who had gone through the same harrowing experience, Marion Hedda Ilse Countess Dönhoff in her book: Names No Longer Used: East Prussia - People and History. She participated in the resistance against Hitler's National Socialists with Helmuth James Graf von Moltke, Peter Yorck von Wartenburg, and Claus Schenk Graf von Stauffenberg. After the war, she became one of the leading German journalists and intellectuals.
A close friend of mine made the trek with his parents from Breslau to Bavaria when he was just four years old.