Considerably in advance of the general line of the position a strong work had been erected; this it was necessary to take before the main position could be attacked, and at two in the afternoon of the 5th, Napoleon directed an assault to be made upon this redoubt. It was obstinately held by the Russians. They were several times driven out, but, as often, reinforcements came up, and it was captured by them; and finally, after holding it until nightfall, they fell back to their main position, the loss having been heavy on both sides. The next day was spent by Napoleon in reconnoitring the Russian position and deciding the plan of attack. Finally he determined to make a strong demonstration against the village of Borodino, and, under cover of this, to launch his whole army upon the Russian left wing. On the morning of the 7th, Napoleon posted himself on an eminence near the village of Chewardino. Near the spot, earthworks were thrown up during the night for the protection of three batteries, each of twenty-four guns. Davoust and Ney were to make a direct attack on the enemy's left. Poniatowski was to endeavour to march through the woods and gain the rear of the Russian position. The rest of the force were to keep the Russian centre and right in check. The Imperial Guard formed the reserve.

On the Russian side Bagration's army formed the left, Beningsen's the centre, and Barclay's the right. The French force numbered about 150,000, the Russian from 80,000 to 90,000. The French had a thousand guns, the Russians 640. At six in the morning of the 7th of September the French batteries opened fire along the whole line, and the Russians at once replied. The roar of artillery was incessant, and ere long the rattle of musketry swelled the din, as Davoust launched the division of Desaix, and Ney that of Campans, against three small redoubts in front of the Russian position. Impetuous as was the assault, the Russians received it with unflinching courage; two of the Russian generals were wounded, but the assault was repulsed. Ney moved up another division, and after severe fighting the redoubts were carried. They were held, however, but a short time, for Woronzow led forward his grenadiers in solid squares, and, supporting the advance by a charge of cavalry, recaptured them, and drove the French back across the ravine in front of them.

There was now a short pause in the attack, but the roar of artillery and musketry continued unbroken. Poniatowski now emerged from the wood, and fell upon the Russian left rear, capturing the village of Outitska. Touchkoff, a brother of the general who had been captured at Loubino, who commanded here, fell back to a height that dominated the village and the ground beyond it, and maintained himself until mid-day. On the French left, where the Viceroy Beauharnois commanded, the advance was stubbornly opposed, and the French artillery was several times silenced by the guns on the eminence. At last, however, the Russians were driven across the rivulet, and the French occupied Borodino. Leaving a division of infantry to protect his rear, the Viceroy crossed the stream and advanced against a great battery in front of the village of Gorki. Davoust and Ney remained motionless until nine o'clock, as Napoleon would not forward the reinforcements they had asked for until he learned that Poniatowski had come into action, and that the Viceroy had crossed the stream and was moving to the attack of the Russian centre. Now, reinforced by the division of Friant, they moved forward.

For an hour the Russians held their advanced works, and then were forced to fall back; and the French, following up their advantage, crossed a ravine and occupied the village of Semianotsky, which had been partially destroyed on the previous day by the Russians, so that if captured it would afford no cover to the French. It was but for a short time that the latter held it. Coming up at the head of his grenadiers, Touchkoff drove them out, recrossed the ravine, and recaptured the advance works they had before so obstinately contested. In turn the French retook the three redoubts; but, again, a Russian division coming up wrested the position from them, and replanted their flag there. Napoleon, seeing that no impression could be made on the Russian left, now sent orders to the Viceroy to carry the great redoubt before Gorki. In spite of the difficulties presented by the broken ground, the three French divisions pressed forward with the greatest gallantry, and, heedless of the storm of grape poured upon them, stormed the redoubt. But its late defenders, reinforced by some battalions from Doctorow's corps, dashed forward to recover the position, and fell with such fury upon the French that the regiment that had entered the redoubt was all but annihilated, and the position regained, while at the same moment two regiments of Russian cavalry fell upon reinforcements pressing forward to aid the defenders, and threw them into disorder.

The Viceroy now opened fire on the redoubt with all his artillery, inflicting such loss upon the defenders that it was soon necessary to relieve them with a fresh division. Ney, finding it impossible to carry and hold the three redoubts in front of him, directed Junot to endeavour to force his way between the main Russian left and Touchkoff's division; but he was met by Prince Eugene's Russian corps, which brought his advance to a standstill. Junot's presence there, however, acted as a support to Poniatowski, who, covered by the fire of forty pieces of cannon, advanced against Touchkoff's division. For a time he gained ground, but the Russian general, bringing up all his troops, assumed the offensive, and, driving Poniatowski back, recovered the lost ground. The brave Russian leader, however, was mortally wounded in the fight. It was now twelve o'clock, and so far the French had gained no advantage. Napoleon felt the necessity for a decisive effort, and concentrating his whole force, and posting 400 guns to cover the advance, sent it forward against the Russian left.

The Russians, perceiving the magnitude of the movement, despatched large reinforcements to the defenders, and at the same time, to effect a diversion, sent the greater portion of their cavalry round to menace the French rear at Borodino. Three hundred Russian guns opposed the four hundred of the French, and amidst the tremendous roar of the guns, the great mass of French infantry hurled themselves upon the Russians. For a time no impression could be made, so sternly and fiercely did the Russians fight, but Bagration, their commander, with several other generals, were badly wounded and forced to retire. Konownitsyn assumed the command, but the loss of the general, in whom they placed implicit confidence, told upon the spirits of his troops, and Konownitsyn was forced to abandon the three redoubts, and to take up a new position behind Semianotsky, where he re-established his batteries and checked the progress of the enemy.

A portion of the French cavalry now made a desperate attempt to break through the Russian left, but two regiments of the Imperial Guard, throwing themselves into squares, maintained their position until five regiments of Russian cuirassiers came up and forced their assailants back. At this critical moment the great mass of Russian cavalry that had been sent round to attack the Viceroy fell upon his rear, drove his cavalry into the village with great loss, and pressed the infantry so hard that the Viceroy himself had to take refuge in one of his squares. Having thus succeeded in distracting the enemy's attention, arresting his tide of battle, and giving time to the Russians to reform and plant their batteries afresh, the Russian cavalry withdrew. The Viceroy recrossed the stream again, and prepared to make another attack upon the great bastion he had before captured, and the whole line again advanced. While the Viceroy attacked the great redoubt in front, Murat sent a division of his cavalry round to fall upon its rear, and, although swept by artillery and infantry fire, the brave horsemen carried out their object, although almost annihilated by the fire of the defenders of the redoubt.

The French infantry took advantage of the attention of the defenders being diverted by this attack, and with a rush stormed the work; the four Russian regiments who held it fought to the last, refusing all offers of quarter, and maintaining a hand-to-hand conflict until annihilated. The Russian artillery, in the works round Gorki, swept the redoubt with their fire, and under its cover the infantry made repeated but vain attacks to recapture it, for their desperate bravery was unavailing against the tremendous artillery fire concentrated upon them, while the French on their part were unable to take advantage of the position they had gained. Napoleon, indeed, would have launched his troops against the works round Gorki, but his generals represented to him that the losses had already been so enormous, that it was doubtful whether he could possibly succeed, and if he did so, it could only be with such further loss as would cripple the army altogether.

At three o'clock Napoleon, whose whole army, with the exception of the Imperial Guard, had been engaged, felt that nothing further could be done that day, and ordered the battle to cease. He had gained the three redoubts on the Russians' left and the great redoubt captured by the Viceroy, but these were really only advanced works, and the main position of the Russians still remained entirely intact. At night the French retired from the positions they had won, to those they had occupied before the battle begun, retaining possession only of the village of Borodino. The loss of the combatants during the two days' fighting had been nearly equal, no less than 40,000 men having been killed on each side, a number exceeding that of any other battle in modern times. Napoleon expected that the Russians would again give battle next morning, but Kutusow, contrary to the opinion of most of his generals, decided on falling back. Beningsen, one of his best officers, strongly urged him to take up a position at Kalouga, some seventy miles to the south of Moscow. The position was a very strong one. Napoleon could not advance against Moscow, which was in a position to offer a long and determined resistance, until he had driven off the Russian army. At Kalouga they could at any moment advance on to his line of communication, cut off all his supplies, and isolate him from France.

The advice was excellent, but Kutusow, who was even more unfitted than Barclay for the post of commander-in-chief, refused to adopt this course, and fell back towards Moscow, followed by the French. The sufferings of the latter had already become severe—the nights were getting very cold, the scarcity of food was considerable, the greater part of the army was already subsisting on horse-flesh, the warm clothing, which was becoming more and more necessary, was far in the rear, their shoes were worn out, and it was only the thought that they would have a long period of rest and comfort in Moscow, that animated them to press forward along the fifty miles of road between Borodino and that city.