>>114463
On D-Day, Nazi General Rommel was away, so his aide, Hans Speidel, was the acting commander of Army Group B that day. He wrote a book about it.

Invasion 1944: Rommel and the Normandy Campaign - Hans Speidel
https://archive.org/details/invasion1944romm0000hans

Later that Nazi general, who was in command against the allies on D-Day, became commander of NATO forces in Western Europe.