Kammala wannan magana: Dukkanin ma'amala sun kasance a asirce, kuma Berlin da Vienna ba su gane cewa sun rasa abokin tarayya ba. Sakamakon haka, lokacin da Yaƙin Duniya na Farko ya ɓarke a watan Yuli na 1914, Italiya ta sanar da cewa Triple Alliance ba ta da amfani, ta ayyana kanta a matsayin tsaka tsaki, kuma ta yi shawarwari game da mafi kyawun yarjejeniya. Biritaniya da Faransa sun yi tunanin sojojin Italiya za su kasance masu amfani, kuma sun ba Italiya manyan yankuna daga Ostiryia da Daular Ottoman. Italiya ta shiga cikin Allies a farkon 1915. Dukkanin kasashen biyu suna cikin "Babban Hudu". Italiya ta shiga cikin
Yaƙin na biyu na Marne da na gaba na Kwana ɗari a Yammacin Yammacin Turai, yayin da 'yan sojojin Faransa suka shiga cikin Yaƙin Kogin Piave da Yaƙin Vittorio Veneto a gaban Italiya. Amsa a Italiya game da bambanci tsakanin alkawuran 1915 da ainihin sakamakon 1919 na Yarjejeniyar Versailles da cin amanar Entente ya kasance mummunan mummunan; rashin gamsuwa mai tsanani, wanda tsoffin sojoji suka tattara, ya haifar da karɓar gwamnatin Italiya ta Fascists karkashin jagorancin Benito Mussolini.