Red Army POWs packed tight on open freight cars of a German train, winter 1941-42. Theirs is “good luck” — they aren’t trudging across the frozen emptiness. The end result though won’t be too different from that of their marching comrades: death rates of up to 70 percent during the move would reduce both populations. Note the car closest to the camera: it is marked FRANCE and SNCF, the acronym of the French national railways.