Commander de Meyer took part in the campaigns of Castelfidardo and of Mentana in 1867; the latter he reclaimed the St. Paul gate, which had fallen
in the hands of the insurgents. He received the military medals of Castelfidardo and Mentana; he was gravely wounded seven times.. Knight of the Order of
"Pius IX," of the "Order of St. Sylvester," of the Order of "St. Gregory the Great" with pension, Knight of the "Order of St. Georges," bestowed by the King of
With his young wife, Maria POCOBELLI (1950-1930), they had to find a refuse at the Vatican, because the Garibaldi forces had place a reward on his head. Maria did not want to leave her husband alone in this new peril and accompanied him through Italy, given that with each step they risked imprisonment or death. Thanks to the recommendations of Monsignor de Mérode, arms minister of his Holiness Pius IX, they were able to stay with the bishops of various cities until reaching the Swiss border. Maria and Jules de Meyer first lived in Soleure and later in Fribourg (Switzerland) where he was named Commander of the Fribourg Police force "Gendarmerie fribourgeoise," from 1882 to1902.
Of his own initiative (motu propio), his Holiness Pope Leo XIII, conferred upon Jules Meyer the nobility title of Count with hereditary transference (primo genitur). A few days before Count de Meyer's death, his Holiness Pius X sent a personal message and his benediction to comfort him in the hour of his illness. He died on the 23rd of July 1907 in Fribourg and was buried at the St. Léonard cemetery.