In the Upper Silesia plebiscite a majority of 31,864 voters voted to remain in Germany while 10,764 votes were given for Poland Following three Silesian Uprisings, the eastern part of Silesia, including Chorzów and Królewska Huta, was separated from Germany and awarded to Poland in 1922.
Migrations of people followed.
Because of its strategic value, the case of the nitrogen factory Oberschlesische Stickstoffwerke was argued for years before the Permanent Court of International Justice, finally setting some new legal precedences on what is "just" in international relations.
In 1934, the industrial communities of Chorzów, Królewska Huta and Nowe Hajduki were merged into one municipality with 81,000 inhabitants.
The name of the oldest settlement Chorzów was given to the whole city.
In April 1939, the settlement of Hajduki Wielkie with 30,000 inhabitants was added to Chorzów.

In part due to the German-Polish trade war in the 1920s, the industry of Chorzów, a border city at that time, stagnated until 1933.
In 1927, a division of Huta Piłsudski was separated into a company making rail cars, trams and bridges; today it operates as Alstom-Konstal.
The State Factory of Nitrogen Compounds (Państwowa Fabryka Związków Azotowych) was in 1933 merged with a similar company (largely its copy) in Tarnów-Mościce.
In the Upper Silesia plebiscite a majority of 31,864 voters voted to remain in Germany while 10,764 votes were given for Poland Following three Silesian Uprisings, the eastern part of Silesia, including Chorzów and Królewska Huta, was separated from Germany and awarded to Poland in 1922. Migrations of people followed. Because of its strategic value, the case of the nitrogen factory Oberschlesische Stickstoffwerke was argued for years before the Permanent Court of International Justice, finally setting some new legal precedences on what is "just" in international relations. In 1934, the industrial communities of Chorzów, Królewska Huta and Nowe Hajduki were merged into one municipality with 81,000 inhabitants. The name of the oldest settlement Chorzów was given to the whole city. In April 1939, the settlement of Hajduki Wielkie with 30,000 inhabitants was added to Chorzów.
In part due to the German-Polish trade war in the 1920s, the industry of Chorzów, a border city at that time, stagnated until 1933. In 1927, a division of Huta Piłsudski was separated into a company making rail cars, trams and bridges; today it operates as Alstom-Konstal. The State Factory of Nitrogen Compounds (Państwowa Fabryka Związków Azotowych) was in 1933 merged with a similar company (largely its copy) in Tarnów-Mościce.
Chorzów