Behind the Scenes, a Tank Expert Kept 'Fury' Authentic

At War is Boring, "Former British Army soldier David Rae got to play a German commander, too":

“You’re not going to see a tank film again,” Rae explained. “There’s not much shelf-life left on these machines.” Fury is these old war wagons’ last chance to show off. Rae was there to make sure they showed off right.