 With the collapse of the Austro-Hungarian Empire following the end of the First World War, Italy was given the regions of Istria and parts of Dalmatia as part of the Treaty of Saint-Germain as promised in the Treaty of London by the Triple Entente.Italy began to revitalize and exploit the population and economic potential of the occupied territories.Before Mussolini's March on Rome in Italy, fascists occupied headquarters of the Workers' Committee in Trieste in 1921, set it on fire and attacked representatives of the Raša Mining Trade Union.