He probably took part in the joint German/Hungarian defence of Nyiregyhaza.

It never fails to amuse me that the liberal media will always use the term "Nazi Germany" to distinguish modern day Germany from its dark chapter and then, suddenly, when they are trying to paint a sympathetic character or they're trying to demonise the communist bloc they'll mysteriously forget all about that political epithet and just go for referring to the Nazi regime as plain old Germany.