- No nuns... no SS... no civilian hostages! Just a German and an American soldier... doing their jobs!
- — Wilhelm Diener src
On the way to him, Wilhelm and his companions drove through a village, killed a constable, went into a church and took the nuns as hostages. Confronted by Sgt. Rock, his companion threatened to kill a nun, but was quickly killed by his superior. They negotiated a short peace, where Wilhelm went to Eisenhower in hurry, followed by Sgt. Rock.
He nearly killed Eisenhower, but was stopped by the following Rock, who threw him off a cliff, killing him in the process. Sgt. Fury arranged a grave for him, honoring him for the saving of the nun.
- He owned an Iron Cross
- He was the last Nazi, Sgt. Rock faced within the first Sgt. Rock volume
- 1 Appearances of Wilhelm Diener (New Earth)
- 1 Images featuring Wilhelm Diener (New Earth)
- 1 Quotations by or about Wilhelm Diener (New Earth)
- Character Gallery: Wilhelm Diener (New Earth)