At the outbreak of World War I the Brigade "Granatieri di Sardegna" moved to the Italian-Austrian border and after Italy's declaration of war on 23 May 1915 the brigade participated in the conquest of Monfalcone on the Adriatic coast. Afterwards the brigade participated in the first four Battles of the Isonzo aimed at conquering the city of Gorizia. The brigade tried to capture the Sabotin hill near Gorizia and later fought at Oslavia. After the brigade had again fought at Oslavia in the Fifth Battle of the Isonzo it was transferred to the Asiago plateau to reinforce the Italian First Army, which was retreating under the massive Austrian-Hungarian Asiago offensive.