Kingdom of Prussia

The Kingdom of Prussia (Königreich Preußen) was originally formed by the merging of the Hohenzollern Dynasty's territories of Brandenburg and East Prussia under a single crown. Though originally divided into two halves by the Polish control of West Prussia, these enclaves were eventually connected and enlarged by the conquests of Frederick the Great in the 18th century. He was the first ruler of Prussia to adopt the title "King of Prussia" as opposed to "King in Prussia", thanks to the acquisition of the West Prussia territories.

Prior to the Titan War, Prussia was one of the major monarchies of Europe to join the anti-republican coalition that opposed France. All thoughts of war against other human nations were quickly dismissed when, in the mid 1790s, the Titans descended on Earth like a plague. Prussia took part in numerous battles in the struggle to defend Europe, but in the end her king Frederick Wilhelm III saw that the war was a lost cause. He constructed the Walls that now surround Prussia and was slain in battle defending them. With no apparent Hohenzollern heir, the cadet branch of the Fritz Dynasty took the throne, withdrawing mankind behind the safety of the Walls.