The Twin Monarchies of Equestria is flourishing, growing strong economically and ideologically. They have allies and puppet states strung all about the world, and their enemies lay defeated or dead.

But a new opponent, crossing dimensional borders, shall arise. The Prussians, having conquered almost their entire planet, grow hungry for more rivals. Through the sacrifice of many howitzers, a portal opened in the North Sea, permitting the travel of ships to a strange new world…

I got the idea for this following a campaign of Empire Total War, playing as Prussia and abusing Howitzers to take almost everywhere by 1787.