[13] Later, placed under the French insignia, he participated in the war against the Spaniards in the Kingdom of Naples and was involved in the Battle of the Garigliano, in recognition of his enterprises, the Bua was invested by the King Louis XII of France of the fiefs of Aquino and Roccasecca.

In 1506, however, he was in the army of the Chaumont, with which he fought against the Bolognese family of Bentivoglio, regaining the Felsineo capital to the sovereignty of the papal (Pope Julius II then granted him the sum of 1,000 florins as a reward for this enterprises).

After other military actions in Lombardy and Piedmont, he went to Liguria, where, in 1507, he quelled the anti-French revolt that broke out in Genoa, decapitating the rebellious doge Paolo da Novi.

In 1508, however, he was hired by Emperor Maximilian I of Habsburg and sent to Flanders under the command of 400 stradiots: he first clashed with the troops of the Duke of Guelders, then took part in the War of Succession in Landshut, Bavaria.

Bua was described as having been a grim-looking soldier, with a rough beard which brushed his cuirass, his head covered with a skull-cap, like the modern Greek capote, rallied his troopers in the open space, and brought them down upon the Huguenots with the speed of greyhounds.

[18] Starting in 1509, after the outbreak of the Third Italian War (also called the War of the League of Cambrai), he returned to Italy, carrying out looting and raids precisely in the territories of that Venetian Republic that had first welcomed him: his raids are known in the country of Bassano, Soave, Caldiero, Cittadella, Castelfranco, Nervesa and near the hills of Montello; he conquered the castles of Lonigo (where he carried out a horrible massacre by massacring more than 1,500 inhabitants and setting fire to their homes).

Prisoner of excellence was the captain of the castle, Gerolamo Emiliani, belonging to the patrician family of the Miani, who, chained and forced to follow the stradriots of Bua in their raids in the upper Trevigian, he would then be miraculously freed.

In 1514 he moved towards Polesine and reconquered Rovigo, taking the Spanish commissioner prisoner; later he carried out other brilliant military operations against Spaniards and Germans, capturing weapons and horses from the enemy.

After having sacked the country of Trento, he entered Este and subsequently flanked Alviano in the new reconquest of Rovigo, previously reoccupied by the Spaniards: the General Domenico Contarini praised again its audacity.

In September 1515 it was, however, on the field of the famous battle of Marignano, where Venetians and French resent the Swiss across the Alps, it seems that on this occasion, with a heroic action of his stradiotts, he managed to save the life of the king of France, present on the battlefield under the command of its troops.

[29] In this work he was praised as "chosen among the Hellenes" or in another verse as "rampart of the Albanians"[30] This poem was found in a manuscript in Italy and was published partially by C. Hopf and in its entirety by Constantine Sathas.