I am not at all pleased to hear that;
The German Empire, led by Prussia, a 17th century amalgam of Germany and Poland, has a tough start: it was almost bankrupt after the devastating 30 Years' War. To add to its problems, its empire was fragmented and overstretched. And the bubonic plague killed a third of its civilians in 1708. Nevertheless, it managed to field significant armies and allied with Britain during the Seven Years' War against France and the rest of Europe.
Certainly the Hohenzollerns(Prussia) had great clout within the Holy Roman Empire, but the shot-callers were the Habsburgs of Vienna(Austro-Hungarian Empire, empire in its own right!). Whilst the Hohenzollerns headed the House of Brandenburg-Prussia, the Habsburgs held sway over most of the rest of the Holy Roman Empire, as most smaller states were still Catholic. Prussia was a Protestant state. The other states to hold seat in the majority were Bavaria, Hesse-Cassel, Hesse-Darmstadt, Wurttemburg, Westphalia and Silesia.