The Prussian Empire is probably the strongest nation currently in Europe, controlling much of the mainland, as well as the territories of Sweden and Norway. This Empire shares borders with France in the west, the Polish-Lithuanian Commonwealth in the east, and the League of Italian States in the south. The Emperor also owns minor tracts of land in Greenland, but that is the extent of Prussian holdings beyond Europe, since the proximity of the Kingdom of Britannia and its powerful navy have always limited the activity of the Prussian maritime forces.
As it is, the Prussian Empire has existed since the beginning of the century, secure and stable. But with Sturgeon's new technology sweeping across the world, that stability is now challenged.