 Complete the following phrase:  After the First World War, most of Austrian Silesia including Opavian Silesia became a part of the newly formed Czechoslovakia. Hlučínsko, a part of Germany, became a part of Czechoslovakia on On February 4, 1920 without a referendum. This was largely due to the fact that most of the regions inhabitants spoke Czech. Leobschütz Polish: Głubczyce, Czech: Hlubčice or Glubčice, a town in northern Opavian Silesia, was supposed to come under the administration of Czechoslovakia if the rest of the 