At the end of World War I and the dissolution of Austria-Hungary in 1918, the area, together with the western part of Inner Carniola and the Upper Carniolan municipality of Bela Peč / Weissenfels (later Italianized to Fusine in Valromana, now a frazione of Tarvisio), was occupied by the Italian army. As stipulated in the 1915 London Pact, a quarter of predominantly Slovene ethnic territory and approximately 327,000 out of total population of 1.3 million Slovenes were adjudicated to Italy by the 1919 Treaty of Saint-Germain and finally annexed according to the 1920 border Treaty of Rapallo.