Nemesis, or the Russian peril approaching Germany, in the early days of the First World War. Above: a view of Konigsberg, the capital of East Prussia (it is now Kaliningrad, conquered by the Soviet Union towards the end of the Second World War). Lower left: General Paul (Pavel Karlovich) von Rennenkampf of the Russian army, leading the invasion of Germany. Lower right: a view of Posen, capital of the Polish province annexed by Prussia in the 18th century (since 1919 Poznan in Poland).