Kammala jumla mai zuwa: Jirgin ruwa guda uku suna da iyakacin aiki a lokacin yakin duniya na, kuma ba su ga aikin ba. A daren ranar 2/3 ga watan Agusta 1916, "Leonardo da Vinci" ya nutse ta hanyar fashewar ciki. An tashe shi a shekara ta 1919; rundunar sojan ruwa ta shirya gyara da sabunta ta, amma ba ta da isassun kuɗi, kuma an sayar da ita a 1923. An sake gina jiragen ruwa guda biyu da suka tsira a tsakiyar shekarun 1930, kuma duka sun ga aikin a lokacin yakin duniya na biyu. A daren 11/12 ga Nuwamba, 1940, jiragen ruwa na torpedo na Burtaniya sun kai wa jiragen ruwa biyu hari a yakin Taranto. "Conte di Cavour" ya lalace sosai, kuma ba a gyara shi gaba daya ba lokacin da Italiya ta mika wuya a watan Satumbar 1943. "Giulio Cesare" a halin yanzu ya tsere ba tare da wata matsala ba, kuma ya shiga cikin yakin Cape Spartivento da
Na farko Sirte a watan Nuwamba 1940 da Disamba 1941, bi da bi. Bayan ƙarshen yaƙin, "Conte di Cavour" ya lalace, kuma "Giulio Cesare" ya mika wuya ga Tarayyar Soviet. An sake masa suna "Novorossiysk", a ƙarshe an nutsar da shi a watan Oktoba 1955 ta tsohuwar ma'adinan Jamus da ta rage daga Yaƙin Duniya na II. Daga baya aka ceto jirginsa a 1957 kuma aka rushe shi daga baya.