At day-break, the Austrian army passed the two bridges of the Bormida. But its movement was slow, because it had but one bridge-head, from which to debouch. O’Reilly passed first, and encountered the division of Gardanne, which General Victor, after having occupied Marengo, had led forward. This division was formed only of the 101st and 44th demi-brigades. O’Reilly, supported by a numerous artillery, and with double the force of his opponent, compelled him to fall back, and shut himself up in Marengo. Fortunately, he did not throw himself into the place after him, but waited till the centre, under General Haddick, should come to his support. The slowness of their march across the defile formed by the bridges, cost the Austrians two or three hours. At length Generals Haddick and Kaim deployed their forces in the rear of O’Reilly, and General Ott passed the same bridges on his way to Castel-Ceriolo.

Thus commenced the great battle of Marengo. The advance, under Gardanne, was obliged to fall back upon Victor. Victor held his position during two hours against the enormous force opposed to him. He was obliged to vacate Marengo, but retook it; and this occurred twice or thrice. Napoleon now ordered Lannes to advance to the support of Victor; but after a long and obstinate contest, the cavalry of Elsnitz suddenly appeared upon the right of Lannes, and both lines were compelled to retreat. The Austrians had fought the battle admirably. The infantry had opened an attack on every point of the French line, while the cavalry debouched across the bridge which the French had failed to destroy, and assailed the right of their army with such fury and rapidity, that it was thrown into complete disorder. The attack was successful every where; the centre of the French was penetrated, the left routed, and another desperate charge of the cavalry would have terminated the battle. The order for this, however, was not given; but the retreating French were still in the utmost peril. Napoleon had been collecting reserves between Garafolo and Marengo, and now sent orders for his army to retreat towards these reserves, and rally round his guard, which he stationed in the rear of the village of Marengo, and placed himself at their head. The soldiers could all see the First Consul, with his staff, surrounded by the two hundred grenadiers of the guard, in the midst of the immense plain. The sight revived their hopes. The right wing, under Lannes, quickly rallied; the centre, reinforced by the scattered troops of the left, recovered its strength; the left wing no longer existed; its scattered remains fled in disorder, pursued by the Austrians. The battle continued to rage, and was obstinately disputed; but the main body of the French army, which still remained in order of battle, was continually, though very slowly, retreating, The First Consul had now dispatched his aid-de-camp, Bruyere, to Desaix, with an urgent message to hasten to the field of battle. Desaix, on his part, had been arrested in his march upon Novi, by the repeated discharges of distant artillery: he had in consequence made a halt, and dispatched Savary, then his aid-de-camp, with a body of fifty horse, to gallop with all possible haste to Novi, and ascertain the state of affairs there, according to the orders of the First Consul, while he kept his division fresh and ready for action. Savary found all quiet at Novi; and returning to Desaix, after the lapse of about two hours, with this intelligence, was next sent to the First Consul. He spurred his horse across the country, in the direction of the fire and smoke, and fortunately met Bruyere, who was taking the same short cut to find Desaix. Giving him the necessary directions, Savary hastened to the First Consul. He found him in the midst of his guard, who stood their ground, on the field of battle; forming a solid body in the face of the enemy’s fire, the dismounted grenadiers stationed in front, and the place of each man who fell being instantly supplied from the ranks behind. Maps were spread open before Napoleon: he was planning the movement which decided the action. Savary made his report, and told him of Desaix’s position. “At what hour did you leave him?” said the First Consul, pulling out his watch. Having been informed, he continued, “Well, he cannot be far off; go, and tell him to form in that direction (pointing with his hand to a particular spot:) let him quit the main road, and make way for all those wounded men, who would only embarrass him, and perhaps draw his own soldiers after them.” It was now three o’clock in the afternoon.

The aged Melas, believing the victory his own, had retired from the field, and left General Zach in command. At this critical moment, the division of Desaix appeared upon the plain. Outstripping the troops, this glorious lieutenant galloped up to the First Consul. He said the battle was lost, but there was yet time to gain another. Bonaparte immediately set about availing himself of the resources brought up by his beloved general.

Desaix’s three demi-brigades were formed in front of San-Giuliano, a little way to the right of the main road. The 30th deployed in line, the 9th and 59th in close column, on the wings of the former. A slight undulation of ground concealed them from the enemy. On the right, rallying and somewhat recovered, were the shattered relics of Chambarlhac’s and Gardanne’s divisions under General Victor. To their right, in the plain, Lannes, whose retreat had been stopped; next to him the Consular Guard, and next again to that, Carra Saint-Cyr, who had maintained himself as near as possible to Castel-Ceriolo. In this position the army formed a long oblique line, from San-Giuliano to Castel-Ceriolo. In an interval between Desaix and Lannes, but somewhat more in the rear, was stationed Kellerman, with his cavalry. A battery of twelve pieces, the sole remains of the whole artillery of the army, was spread out in front of Desaix’s line.

These dispositions made, the First Consul passed on horseback along the lines of his soldiers, speaking to several corps. “My friends,” said he to them, “you have retreated far enough; recollect that I am in the habit of sleeping on the field of battle.” After having re-animated his troops, who were re-assured by the arrival of their reserves, and burning to avenge the events of the morning, he gave the signal. The charge was beaten along the whole length of the lines.

The Austrians, who were rather in order of march than of battle, kept the high road. The column directed by M. de Zach came first; a little behind it came the centre, half deployed on the plain and facing Lannes. General Marmont suddenly unmasked his twelve pieces of cannon. A heavy discharge of grape-shot fell upon the head of the column, which was completely taken by surprise, and suspecting nothing less than further resistance, for they thought the French decidedly on their retreat. They had not yet recovered from their surprise, when Desaix put the 9th light infantry in movement. “Go and inform the First Consul,” said he, to his aid-de-camp[aid-de-camp], Savary, “that I am charging, and that I must be supported by the cavalry.” Desaix, on horseback, charged in person at the head of his demi-brigade. He led it over the slight inequality of ground which concealed him from the view of the Austrians, and made them aware of his presence by a discharge of musketry at point blank distance. The Austrians poured in an answering volley; and Desaix fell on the instant, pierced by a bullet in the breast. “Conceal my death,” said he to General Boudet, who was his chief of division, for it might, he thought, produce a panic among his men. Useless precaution of the young hero. He was seen to fall, and his soldiers, like those of Turenne, clamorously demanded to be led forward to avenge the death of their leader. The 9th light infantry, which on that day gained for itself the title of “The Incomparable,” a distinction which it bore to the conclusion of the war; the 9th light infantry, after pouring its fire upon the enemy, formed in column, and fell upon the deep mass of the Austrians. At the sight, the two first regiments that led the march, surprised and confounded, fell back in disorder upon the second line, and disappeared amidst its ranks. Lattermann’s column of grenadiers were now at the head, and received the shock as chosen troops might be expected to receive it. They were firm. The struggle extended to the two sides of the main road. The 9th light infantry was supported to the right by Victor’s troops, which had rallied; to the left, by the 30th and 59th demi-brigades of Boudet’s division, which followed the movement. Lattermann’s grenadiers were defending themselves stoutly, though hard pressed, when suddenly a storm burst on their heads. General Kellermann, who, at the instance of Desaix, had received orders to charge, set off at full gallop, and passing between Lannes and Desaix, placed part of his squadron en potence to make head against the Austrian cavalry, whom he saw before him, and then, with the remainder, threw himself on the flank of the column of grenadiers, already assailed in front by Boudet’s infantry. By this charge, which was executed with extraordinary vigor, the column was cut in two. Kellermann’s dragoons sabred it to the right and left, till, pressed on every side, the unfortunate grenadiers threw down their arms. Two thousand of them surrendered themselves prisoners. At their head, General Zach himself was compelled to give up his sword, and in this manner the Austrians were deprived of any leader until the battle ended. But Kellermann did not stop here; he dashed on the dragoons of Lichtenstein and broke them! These recoiled in disorder on the centre of the Austrians, as it was forming in the plain, in front of Lannes, and there caused some confusion. At this moment Lannes advanced, pressed vigorously on the Austrians’ centre, which was shaken, while the grenadiers of the Consular Guard and of Carra Saint-Cyr again bore down upon Castel-Ceriolo, from which they were not far distant. Along the whole line from San-Giuliano to Castel-Ceriolo, the French had now resumed the offensive; they marched forward, drunk with joy and enthusiasm, at seeing the victory again returning to their hands. Surprise and discouragement had passed to the side of the Austrians.

From the Giuliano to Castel-Ceriolo, the oblique line of the French advancing at charging pace, pushed the enemy back, and compelled them to strive to escape by way of the bridges over the Bormida.

The slaughter of the Austrians was dreadful. Their army was thus thrown into the utmost confusion in a moment; and the victory, which had seemed quite secure to them at three o’clock, was completely won by the French at six. The pursuit continued far into the night, the mixed deaths and mangling upon the dark bridges being one confused and crowded horror; while the whole of the Austrians who had remained on the left bank were taken prisoners, or driven with headlong devastation into the Bormida. The waters ran a deep red with the blood of horses and of men, and presented in some parts a clotted surface of their mangled remains. Several entire battalions surrendered at discretion, and General Zach and all his staff were made prisoners.

The greater part of the French army encamped on the field of battle.

It was now about seven o’clock in the evening. The storm of conflict was hushed; but the ghastly burden of the field was revealed in all its horror by the glare of the watch-fires, and the light of the moon. The mangled dead were lying in heaps where the struggle had been most desperate; and the Bormida was a river of blood. Near the village of San Giuliano, a single officer could be seen walking among the bodies of the slain, leading his horse. For some time it seemed as if his search would be vain. Many of the bodies had been completely stripped by the enemy, and their features were mangled so that it was almost impossible to recognise them. Suddenly, however, Savary halted. In the midst of a circle of bodies, was stretched the manly form of Desaix, which the aid-de-camp recognised by the long, flowing hair which fell upon the neck, and the noble expression of the countenance, which had not altered in the agonies of death. The young man knelt down and wept over that form, like a child; for he had learned to look up to the heroic general as a father. He loved Desaix with that noble devotion which only the highest qualities can excite, and which is so admirable as to make us proud of our human nature. Savary gave free vent to his grief, and then, wrapping his cloak around the body, he lifted it upon his horse, and slowly returned with it to head-quarters. As he passed the watch-fires, the troops, who were in the highest spirits in consequence of the unexpected victory, recognised the body of Desaix, ceased their talk, and respectfully uncovered. At length, Savary brought his melancholy burden to the head-quarters of General Bonaparte, at Torre-di-Garofolo. Leaving the body in charge of some soldiers, he entered the old mansion, which had been selected for head-quarters, and was ushered into the presence of the First Consul. Bonaparte was seated amidst his principal officers, talking over the thrilling incidents of the day, and complimenting those who had particularly distinguished themselves, and there was scarcely one who did not bear sanguine marks of the fight.