aftermath of world war i arguin autonomous silesian voivodeship battle of annaberg bishopric of minden bytom county of mark county of ravensberg draheim duchy of cleves duchy of magdeburg duchy of prussia east frisia ethnic germans expulsion of germans after world war ii february german ab-aktion operation in poland german colonial empire german language germans gliwice grand duchy of posen grand duchy of the lower rhine greater berlin act guillotine halle-merseburg hesse-nassau katowice landsmannschaft schlesien list of countries by population list of national capitals lower silesian offensive march margraviate of brandenburg minden-ravensberg new east prussia new silesia official opole opole voivodeship poles polish language population density posen-west prussia potsdam agreement principality of halberstadt prison camp province of brandenburg province of east prussia province of hanover province of hohenzollern province of kurhessen province of lower silesia province of magdeburg province of nassau province of pomerania province of posen province of prussia province of saxony province of schleswig-holstein province of silesia province of westphalia provinces of prussia prussia prussian guelders red army regierungsbezirk repression rhine province second polish republic silesia silesian uprisings silesian voivodeship silesian language silesians south prussia soviet union upper silesia upper silesia plebiscite upper silesian offensive volhynia weimar republic west prussia world war i world war ii zabrze