Barny de Romanet joined the army in October 1913. After serving in combat with cavalry and infantry regiments, he transferred to the French Air Service in July 1915. He received a Pilot's Brevet in January 1916 and was assigned as a reconnaissance pilot to C51. After training on single-seat fighters in February 1917, Barny de Romanet was reassigned to N37 where he received the Médaille Militaire for shooting down his first enemy aircraft. Having been credited with ten victories by 22 August 1918, he assumed command of Spa167 and remained with this Escadrille until the end of the war.
"Elite pilot, as brilliant in pursuit aviation as he was in reconnaissance. Has had numerous combats giving proof under all circumstances of the highest military qualities. On 3 May 1917 he attacked, over their lines, two enemy scouts and downed one of them. Already cited three times in orders." Médaille Militaire citation, 23 May 1917
Chevalier de la Légion d'Honneur
"Elite officer, who received notice in the cavalry at the beginning of the war by bold reconnaissances, then in observation aviation, and finally in pursuit aviation where his brilliant qualities as a pilot, his coolness, and his daring in combat are always cited as examples. He inspires his patrols to attack enemy planes very superior in number putting them to flight and flaming one of them. Also, recently he downed successively two German planes, reporting therewith his 16th and 17th victories. Médaille Militaire for feats of war. Six citations." Chevalier de la Légion d'Honneur citation