The Italian front was one of the main theatres of war of World War I. It involved a series of military engagements in Northern Italy between the Central Powers and the Entente powers from 1915 to 1918. Following secret promises made by the Allies in the 1915 Treaty of London, the Kingdom of Italy entered the war on the Allied side, aiming to annex the Austrian Littoral, northern Dalmatia and the territories of present-day Trentino and South Tyrol.

The Kingdom of Italy was a state that existed from 17 March 1861, when Victor Emmanuel II of Sardinia was proclaimed King of Italy, until 12 June 1946, when the monarchy was abolished, following civil discontent that led to an institutional referendum on 2 June 1946, which resulted in a modern Italian Republic. The kingdom was established through the unification of several states over a decades-long process, called the Risorgimento. That process was influenced by the Savoy-led Kingdom of Sardinia, which can be considered Italy's legal predecessor state.