Wardaddy hides on top of Fury and sees a Nazi SS officer riding on horseback through the ruins of the battle, looking for survivors. Wardaddy jumps on him, knocks him off the horse and stabs him in his eye socket viciously several times until he dies.

Who killed Wardaddy?

Right as Norman escapes, two German stick grenades are dropped into the hatch and detonate, killing Wardaddy. Norman hides until the next morning and finds Don's corpse the next day, covering it with his coat out of respect. He hears someone outside the tank and grabs Don's revolver, aiming it at the hatch.

How old is Wardaddy in Fury?

At 50, Brad Pitt, as Wardaddy, is considerably older than the average WWII NCO (non-commissioned officer), who likely would have been in his mid-twenties to early thirties. (David Ayer had originally written the character to be in his late twenties, but looking middle-aged due to the stress of war.)