at first stayed neutral but in 1915 signed the [ http://en.wikipedia.org/wiki/Treaty_of_London_(1915) Treaty of London], entering [ http://en.wikipedia.org/wiki/Triple_Entente Entente] on the promise of receiving Trento , Trieste , Istria , Dalmatia and parts of Ottoman Empire . During the war, 600,000 Italians died, and the economy collapsed. Under the [ http://en.wikipedia.org/wiki/Treaty_of_Saint-Germain-en-Laye_(1919) Peace