adam stegerwald augustus ii the strong austro-prussian war brandenburg-prussia duchy of prussia franco-prussian war franz von papen frederick ii of prussia frederick i of prussia frederick william iii of prussia frederick william ii of prussia frederick william iv of prussia frederick william i of prussia german empire german language holy roman empire house of hohenzollern john ii casimir of poland king in prussia kingdom of prussia kurt von schleicher margraviate of brandenburg monastic state of the teutonic knights north german confederation otto braun partitions of poland paul hirsch poland prince-elector prussia royal prussia sigismund i the old social democratic party of germany teutonic knights treaty of wehlau weimar republic wilhelm marx world war i