 Complete the following phrase:  The Czechoslovak request was rejected by Poland and Czechoslovakia attacked the Polish part of the region on 23 January 1919 and forced Poland, which was at that time at war also with the West Ukrainian National Republic, to withdraw from the larger part of the area. After a ceasefire, both sides agreed to hold a plebiscite, which never took place, as the atmosphere in the region remained heated and turned violent. The entire area was divided by the decision of the 