A little bit of historical background of the game ...
It's 1403, 25 years after Karl IV's death (Czech emperor of the Holy Roman empire). His sons Wenzel (Wenceslaus) and Sigismund are battling for the throne.
Sigismund has lured his older brother Wenzel to Rome to force him to abdicate in favour of him. The country is on the brink of civil war and German and Habsburg noblemen are starting to participate in the struggle, building up to the Hussite wars that started after Jan Hus (Czech religious reformer) was burned to death as a heretic by catholics.