EN
During the period of the First Republic, a numerous Polish was living in the territory of Cieszyn Silesia, a region which always had great economic and strategic importance for the Czechoslovak Republic. After the deterioration of Czechoslovak-Polish relations and the initiation of Polish diversion operations in Cieszyn Silesia in 1935, the Czechoslovak authorities reached for repressive measures against members of the Polish minority; among these actions, they launched an operation of transferring railway workers of Polish nationality into the midlands in the years 1935-1936. This article is based in study of official government documents, particularly from the Ministry of Railways, the Police Office in Moravian Ostrava, nationalist associations (Slezská Matice osvěty lidové) and also the Polish general consulate in Moravian Ostrava. The selection of documents makes up a significant portion of the article.