The Battle of Vittorio Veneto was fought from 24 October to 3 November 1918 (with an armistice taking effect 24 hours later) near Vittorio Veneto on the Italian Front during World War I. After having thoroughly defeated Austro-Hungarian troops during the defensive Battle of the Piave River, the Italian army launched a great counter-offensive: the Italian victory marked the end of the war on the Italian Front, secured the dissolution of the Austro-Hungarian Empire and contributed to the end of the First World War just one week later. The battle led to the capture of over 5,000 artillery pieces and over 350,000 Austro-Hungarian troops, including 120,000 Germans, 83,000 Czechs and Slovaks, 60,000 South Slavs, 40,000 Poles, several tens of thousands of Romanians and Ukrainians, and 7,000 Austro-Hungarian loyalist Italians and Friulians.
When the battle was fought in November 1918, the nearby city was called simply Vittorio, named in 1866 for Vittorio Emanuele II, monarch from 1861 of the newly created Kingdom of Italy. The engagement, the last major battle in the war (1915–1918) between Italy and Austria-Hungary, was generally referred to as the Battle of Vittorio Veneto, i.e. 'Vittorio in the Veneto region'. The city's name was officially changed to Vittorio Veneto in July 1923.
During the Battle of Caporetto, from 24 October to 9 November 1917, the Italian Army suffered over 300,000 casualties (dead, injured and captured) and was forced to withdraw, causing the replacement of the Italian Supreme Commander Luigi Cadorna with General Armando Diaz. Diaz reorganized the troops, blocked the enemy advance by implementing defense in depth and mobile reserves, and stabilized the front-line around the Piave River.
In June 1918, a large Austro-Hungarian offensive, aimed at breaking the Piave River defensive line and delivering a decisive blow to the Italian Army, was launched. The Austro-Hungarian Army tried on one side to force the Tonale Pass and enter Lombardy, and on the other side to make two converging thrusts into central Venetia, the first one southeastward from the Trentino, and the second one southwestward across the lower Piave.