have influence on the Danish king, originally. This war, the Second War of Schleswig, was unrelated to the Confederation. (The Bundesexekution became meaningless.) The defeated Danish king had to leave Schleswig and Holstein to Austria and Prussia. They created a condominium over Schleswig and Holstein. Under the Gastein Convention of 14 August 1865, Lauenburg was given to Prussia, while Austria administered Holstein and Prussia Schleswig. However, tensions between the two German powers culminated in the Austro-Prussian War of 1866. Follwowing the Peace of Prague, the victorious Prussians annexed both Schleswig and Holstein, creating the province of Schleswig-Holstein. Provision for the cession of northern Schleswig to Denmark was made pending a popular vote in favour of this. In 1878, however, Austria went back on this provision, and Denmark recognized in a Treaty of 1907 with Germany that, by the agreement between Austria and Prussia, the frontier between Prussia and Denmark had finally been settled. Since 1900 The Treaty of Versailles provided for plebiscites to determine the allegiance of the region. Thus, two referendums were held in 1920, resulting in the partition of the region. Northern Schleswig voted by a majority of 75% to join Denmark, whereas Central Schleswig voted by a majority of 80% to remain part of Germany. In Southern Schleswig, no referendum was held, as the likely outcome was apparent. The name Southern Schleswig is now used for all of German Schleswig. This decision left substantial minorities on both sides of the new border. Following the Second World War, a substantial part of the German population in Southern Schleswig changed their nationality and declared themselves as Danish. This change was caused by a number of factors, most importantly the German defeat and an influx of a large number of refugees from the former Prussian eastern provinces, whose culture and appearance differed from the local Germans, who were mostly descendants of Danish families who had changed their nationality in the 19th century. The change in demographics created a temporary Danish majority in the region and a demand for a new referendum from the Danish population in South Schleswig and some Danish politicians, including prime minister Knud Kristensen. However, the majority in the Danish parliament refused to support a referendum in South Schleswig, fearing that the "new Danes" were not genuine in their change of nationality. This proved to be the case and, from 1948 the Danish population began to shrink