 Complete the following phrase:  Such a large growth in population was owing to an industrial development within the district luring a large influx of migrant workers, mostly from western Galicia. Traditionally the area in most parts was inhabited by Silesian Lachs speaking Cieszyn Silesian dialect. After World War I and fall of Austria-Hungary the region of Cieszyn Silesia including the territory of Freistadt political district became disputed land between Czechoslovakia and Poland. This led to 