Kłodzko Valley
The last attempt occurred in May 1945, when Czechoslovakia tried to annex the area, whose German-speaking majority was being expelled by Polish authorities. The Czechs argued that because of the small Czech minority present in the western part of the Kłodzko Valley, which was called the region's "Czech Corner" by the German majority, the area should go over to Czechoslovakia instead of being assigned to Poland, as no relevant Polish minority lived in the area. Pressure brought on by the Soviet Union led to a ceasing of military operations, with the Czech minority being expelled to Germany and Czechoslovakia. According to canon law of the Roman Catholic Church, the area remained part of the Roman Catholic Archdiocese of Prague until 1972.