Gardanne, who had managed to climb the ranks of the army during his stay in Italy, was certain that no help would come from Moreau. Nevertheless, convinced that it was for the good of the fatherland, as well as necessary to maintain his own honor and that of his garrison, he decided to resist the Austro-Russian forces and not to surrender the citadel. He continually encouraged his men, calling them back when it was time to take measures to defend the walls. Bellegarde's forces, on the other hand, numbered, at least initially, more than 20,000 men, with over 130 large-
caliber artillery pieces, recently brought from the armories of Turin, ready to fire on the walls of the fortress. Suvorov himself was seen in the city, intent on supporting his men. The two sides, as previously done by Fiorella in Turin, agreed to attack only from the outside, so that the city and its inhabitants would not be involved. After that, preparations for the siege began. Bellegarde had a first circumvallation trench dug. Once finished, on 14 July, Bellegarde called Gardanne and asked him what his intentions were: the Frenchman intended to resist. The citadel was hit by a myriad of shells, to which Gardanne tried to respond with his cannons. In total, about 300 cannons, mortars and howitzers were firing. The quantity of shells fired by the allies was so great that a good part of the cannon beds broke, perhaps due to excessive vibrations. The effects of the bombardment were clear: numerous French gunners had been hit, a barracks was caught in a fire and on 16 July a gunpowder depot exploded. Taking advantage of the moment, the besiegers rushed forward and, by using hoes, managed to begin digging a second line of trenches. Gardanne attempted to prevent the attackers from approaching, using arquebuses, as the cannons had proven ineffective. Bellegarde's soldiers managed to complete the work and, taking advantage of the night, moved part of the artillery into the new trench. In particular, the Piedmontese, who had returned to the service of the
Savoy family, distinguished themselves. The success of the operation was not flawless: on 18 July,
General Chasteler was seriously wounded and his nephew killed. Suvorov's post as
Chief of Staff was temporarily filled by
General Zach. Many other Russian soldiers also fell victim to French fire. The purpose of this second trench was to force the Republicans to abandon the covered bridge that connected Alessandria with the fortress, located on the opposite bank of the
Tanaro, and allow the complete encirclement of the citadel. After the artillery movement was completed between 18 and 19 July, the constant fire of the Allies, less than 60 meters away from the covered road, forced Gardanne's men to abandon it. The following night, the road was occupied by the attackers. As the time for the final assault approached, with no ammunition left and only four guns still fit to fire, Gardanne asked his officers to prepare for surrender the next day, believing he had fully fulfilled his duty. ==Consequences==