The term "battle of 1870/71" refers to the Franco-Prussian War (also known as the Franco-German War), a conflict that resulted in the unification of Germany, the end of the French Second Empire, and a major shift in the European balance of power.
Imagine that the House Hanover lost. Went back, declared being really bad losers the German Empire, just without France, but with that "King" of the Second Empire now at home once for ever, to eventually come back as far as Verdun some time later, being ever even worse losers to now go all in so hard that only threatening to blow up the entire planet stopped the rest of the world from killing each single one of them having build the worst torture facilities in human history by their need of someone working instead of them never talking even "No" for an answer; As simple it is to understand.
