German minority were closely scrutinized by the Polish authorities beginning with the earliest phase of Polish policy towards the German minority. The German theatre was re-opened by the Nazis in 1943, while the last director of the Polish theatre in the city in the years 1922–24 was murdered by them. In the interbellum, Grudziądz served as an important centre of culture and education with one of the biggest Polish military garrisons and several military schools located both in and around the city. A large economic potential and the existence of important institutions like the Pomeranian Tax Office and the Pomeranian Chamber of Industry and Trade, helped Grudziądz become the economic capital of the Pomeranian Voivodeship in the interwar period. Grudziądz's economic potential was featured at the First Pomeranian Exhibition of Agriculture and Industry in 1925, officially opened by Stanisław Wojciechowski, President of the Second Polish Republic. The 64th and 65th Infantry Regiments and the 16th Light Artillery Regiment of the Polish Army were stationed in Grudziądz during the 19 years of the inter-war period. They were part of the 16th Infantry Division, which had its headquarters in the city, as did the cavalry's famous 18th Pomeranian Uhlan Regiment. The Grudziądz Centre of Cavalry Training educated many notable army commanders, including future Polish resistance hero Witold Pilecki. Military education in Grudziądz was also provided by the Centre of the Gendarmerie, the Air School of Shooting and Bombarding, and the N.C.O. Professional School, which offered courses for infantry reserve officer cadets. In 1920 a German-language school was founded. In 1931 the Polish government decreed a reduction in the number of German classes in the school and requested lists of Catholic children and those pupils with Polish-sounding names which they viewed as victims of Germanization, from the German school. Although the list was not prepared, some of the children were transferred, which led to a school-strike. The German school followed ideas and customs as those in Germany. It was headed by a Nazi sympathiser Hilgendorf who praised Nazi ideology The Polish authorities were alarmed when a notebook of one female student was discovered by them, which contained the Nazi party anthem, the Horst Wessel Lied and revisionistic text. The discovery caused outrage and calls to dismiss Hilgendorf due to his irredentist beliefs In November 1933 two German craftsmen were killed by a Polish mob during a local election campaign. World War II On