Mutilated victory (Italian: vittoria mutilata) is a term coined by Gabriele D'Annunzio at the end of World War I, used by a part of Italian nationalists to denounce the partial infringement (and request the full application) of the 1915 Treaty of London concerning territorial rewards for Kingdom of Italy.
In the 1915 treaty, Italy had agreed to join the powers of the Triple Entente in their war against Austria-Hungary and the German Empire in exchange for the Entente powers’ recognition of Italy’s control over Southern Tyrol, the Austrian Littoral and territories in Dalmatia. These lands were inhabited by Italians—alongside Austrian Germans (Tyroleans) and Slavs (Slovenes and Croats)—but had not become part of the Kingdom upon Italian unification in the late 19th century. Additionally, Italy was assured ownership of the Dodecanese, possessions in Albania, and a sphere of influence around the Turkish city of Antalya, alongside a possible enlargement of its colonial presence in Africa.