During World War I the regiment served as infantry, until 17 November 1915 on the lower Isonzo and from May 1916 on the Asiago plateau, where Austro-Hungarian army tried to break through the Italian lines. During the Eleventh Battle of the Isonzo the regiment fought on the Banjšice Plateau. After the disastrous defeat in the Battle of Caporetto the regiment covered the Italian retreat to the Piave river, fighting rearguard actions at Cividale del Friuli e Fagagna. In 1918, after the Italian crushing victory at the Battle of Vittorio Veneto, the regiment, like all cavalry regiments, was ordered to advance as fast and as far as possible and to take the bridges of the Tagliamento and Isonzo rivers. The Aosta took the bridge over the Tagliamento at Latisana on 3 November 1918 and charged Austro-Hungarian defenses at Corgnolo on 4 November, the last day of the war. For the capture of the bridge and the last charge of the war the regiment received a Bronze Medal of Military Valour.