[1][2][3] After the Kingdom of Italy entered World War I, on 5 June 1915 he left with his regiment for the Isonzo front, where in May 1916 he earned a Silver Medal of Military Valor for having distinguished himself in the fighting in Monfalcone.

On 16 September 1917 he assumed command of a squadron of the 3rd Regiment "Savoia Cavalleria"; one year later he participated in the battle of Vittorio Veneto, being among the first to re-enter Udine in November 1918, occupying the town for 24 hours with just forty men and taking six hundred Austro-Hungarian prisoners, a feat for which he was awarded another Silver Medal for military valor.

At the end of the war he remained in the newly occupied north-eastern territories, and with the position of commander of the 3rd Squadron of "Savoia Cavalleria", he served first in Trieste, then in Terranova and subsequently in Bistena.

[1][2][3][4][5] On 1 April 1919 he returned to the Milan garrison, after which he served from 28 January to 5 August 1920 at the Inter-Allied Commission for the Control of the Plebiscite for the territory of Hallstein, in East Prussia.

On 7 April 1920 he married in Turin Miss Maddalena Pia of the Marquises Fracassi Ratti Mentone of Torre Rossano, with whom he had a daughter, Francesca Maria.