A serene scene, a column of 9.7 ton Sd.Kfz. 7 artillery tractors towing 15-cm schwere Feldhaubitze sFH 18 howitzers through a fir forest, the boughs laden with snow. One can almost hear the idling engines, muffled by the trees. But there’s a hidden danger… The sign warns of Glatteis – black ice – which the tracked vehicles don’t have any greater problem negotiating, but which the towed guns might have. Without snow chains, the hard rubber tires might skid if there’s a sharp turn, and 5.3 tons of hardware could end up in a ditch… What would that look like? See tomorrow’s post.