The brief insurrection of Pavia suppressed by these severities, Buonaparte once more turned his thoughts to the strong position of the Austrians, with the purpose of reducing Beaulieu to a more decided state of disability, before he executed the threatened vengeance of the Republic on the Sovereign Pontiff. For this purpose he advanced to Brescia, and manœuvred in such a manner as induced Beaulieu, whom repeated surprises of the same kind had not put upon his guard, to believe, that either the French general intended to attempt the passage of the Mincio at the small but strong town of Peschiera, where that river issues from the lago di Guarda, or else that, marching northward along the eastern bank, he designed to come round the head of the lake, and thus turn the right of the Austrian position. While Beaulieu disposed his forces as expecting an attack on the right of his line, Buonaparte, with his usual celerity, proposed to attack him on the centre, at Borghetto, a town situated on the Mincio, and commanding a bridge over it, above ten miles lower than Peschiera.
On the 30th May, the French general attacked with superior force, and repulsed across the Mincio, an Austrian corps who endeavoured to cover the town. The fugitives attempted to demolish the bridge, and did break down one of its arches. But the French, rushing forward with impetuosity, under cover of a heavy fire, upon the retreating Austrians, repaired the broken arch so as to effect a passage, and the Mincio, passed as the Po and the Adda had been before, ceased in its turn to be a protection to the army drawn up behind it.
Beaulieu, who had his headquarters at Valeggio, a village nearly opposite to Borghetto, hastened to retreat, and evacuating Peschiera, marched his dismayed forces behind the Adige, leaving five hundred prisoners, with other trophies of victory, in the hands of the French. Buonaparte had designed that this day of success should have been still more decisive; for he meditated an attack upon Peschiera at the moment when the passage at Borghetto was accomplished; but ere Augereau, to whom this manœuvre was committed, had time to approach Peschiera, it was evacuated by the Austrians, who were in full retreat by Castel Nuovo, protected by their cavalry.153
The left of the Austrian line, cut off from the centre by the passage of the French, had been stationed at Puzzuolo, lower on the Mincio. When Sebottendorf, who commanded the Imperial troops stationed on the left bank, heard the cannonade, he immediately ascended the river, to assist his commander-in-chief to repel the French, or to take them in flank if it was already crossed. The retreat of Beaulieu made both purposes impossible; and yet this march of Sebottendorf had almost produced a result of greater consequence than would have been the most complete victory.
The French division which first crossed the Mincio, had passed through Valeggio without halting, in pursuit of Beaulieu, by whom the village had been just before abandoned. Buonaparte with a small retinue remained in the place, and Massena's division were still on the right bank of the Mincio, preparing their dinner. At this moment the advanced guard of Sebottendorf, consisting of hulans and hussars, pushed into the village of Valeggio. There was but barely time to cry to arms, and, shutting the gates of the inn, to employ the general's small escort in its defence, while Buonaparte, escaping by the garden, mounted his horse and galloped towards Massena's division. The soldiers threw aside their cookery, and marched instantly against Sebottendorf, who, with much difficulty, and not without loss, effected a retreat in the same direction as his commander-in-chief Beaulieu. This personal risk induced Buonaparte to form what he called the corps of guides, veterans of ten years' service at least, who were perpetually near his person, and, like the Triarii of the Romans, were employed only when the most desperate efforts of courage were necessary. Bessières, afterwards Duke of Istria, and Marshal of France, was placed at the head of this chosen body, which gave rise to the formation of the celebrated Imperial Guards of Napoleon.154
The passage of the Mincio obliged the Austrians to retire within the frontier of the Tyrol; and they might have been considered as completely expelled from Italy, had not Mantua and the citadel of Milan still continued to display the Imperial banners. The castle of Milan was a place of no extraordinary strength, the surrender of which might be calculated on so soon as the general fate of war had declared itself against the present possessors. But Mantua was by nature one of those almost impregnable fortresses, which may long, relying on its own resources, defy any compulsion but that of famine.
The town and fortress of Mantua are situated on a species of island, five or six leagues square, called the seraglio, formed by three lakes, which communicate with, or rather are formed by, the Mincio. This island has access to the land by five causeways, the most important of which was in 1796 defended by a regular citadel, called, from the vicinity of a ducal palace, La Favorità. Another was defended by an intrenched camp, extending between the fortress and the lake. The third was protected by a horn-work. The remaining two causeways were only defended by gates and draw-bridges. Mantua, low in situation, and surrounded by water, in a warm climate, is naturally unhealthy; but the air was likely to be still more destructive to a besieging army, (which necessarily lay in many respects more exposed to the elements, and were besides in greater numbers, and less habituated to the air of the place,) than to a garrison who had been seasoned to it, and were well accommodated within the fortress.
To surprise a place so strong by a coup-de-main was impossible, though Buonaparte represents his soldiers as murmuring that such a desperate feat was not attempted. But he blockaded Mantua [June 4] with a large force, and proceeded to take such other measures to improve his success, as might pave the way to future victories. The garrison was numerous, amounting to from twelve to fourteen thousand men; and the deficiencies of the fortifications, which the Austrians had neglected in over security, were made up for by the natural strength of the place. Yet of the five causeways, Buonaparte made himself master of four; and thus the enemy lost possession of all beyond the walls of the town and citadel, and had only the means of attaining the mainland through the citadel of La Favorità. Lines of circumvallation were formed, and Serrurier was left in blockade of the fortress, which the possession of four of the accesses enabled him to accomplish with a body of men inferior to the garrison.155
To complete the blockade, it was necessary to come to some arrangement with the ancient republic of Venice. With this venerable government Napoleon had the power of working his own pleasure; for although the state might have raised a considerable army to assist the Austrians, to whom its senate, or aristocratic government, certainly bore good will, yet, having been in amity with the French Republic, they deemed the step too hazardous, and vainly trusting that their neutrality would be respected, they saw the Austrian power completely broken for the time, before they took any active measures either to stand in their defence, or to deprecate the wrath of the victor. But when the line of the Mincio was forced, and Buonaparte occupied the Venetian territory on the left bank, it was time to seek by concessions that deference to the rights of an independent country which the once haughty aristocracy of Venice had lost a favourable opportunity of supporting by force.
There was one circumstance which rendered their cause unfavourable. Louis XVIII., under the title of a private person, the Comte de Lille, had received the hospitality of the republic, and was permitted to remain at Verona, living in strict seclusion. The permission to entertain this distinguished exile, the Venetian government had almost mendicated from the French revolutionary rulers, in a manner which we would term mean, were it not for the goodness of the intention, which leads us to regard the conduct of the ancient mistress of the Adriatic with pity rather than contempt. But when the screen of the Austrian force no longer existed between the invading armies of France and