Exactly how long can a gap-toothed, middle-aged Valkyrie get schtupped in the corner of a minuscule room in this German import? Thirty minutes a turn is really pushing it —same angles; different foot soldiers. Vol. 13 features a more youthful fraulein but the Bunker mentality remains the same. Vigorous anal slamming is undone by stodgy camerawork. Nein! They'll never win a war this way.