Buonaparte continued the pursuit of the Allies as far as Pirna, whence, owing to indisposition, he returned to Dresden; but Vandamme, Murat, Marmont, and St. Cyr pushed forward by different ways to cut off the route of the fugitives into the mountains of Bohemia. Vandamme, however, having passed Peterswald, beyond which he had orders not to proceed, was tempted to try for Töplitz, where the Allied sovereigns lay, and take it. In doing this he was enclosed, in a deep valley near Kulm, by Ostermann and other bodies of the Allies, completely routed, and taken prisoner, with Generals Haxo and Guyot, the loss of two eagles, and seven thousand prisoners. This was on the 29th of August.

On the 26th Blucher had nearly annihilated the division of Macdonald. No sooner did he learn the return of Buonaparte to Dresden than he wheeled round upon Macdonald, taking him by surprise, and driving his troops into the rivers Katzbach and Neisse, swollen by the rains. The battle raged the most fiercely near Wahlstadt, and, on the subsidence of the floods, hundreds of corpses were seen sticking in the mud. A part of the French fled for a couple of days in terrible disorder along the right bank of the Neisse, and were captured, with their general, by the Russian commander, Langeron.

The same fate befell the troops of Ney, who had been sent to dislodge Bernadotte and Bülow before Berlin. He was beaten at Dennewitz on the 6th of September, with a loss of eighteen thousand men and eighty guns. Macdonald had lost on the Katzbach many thousands slain or dispersed, eighteen thousand prisoners, and a hundred and three guns. His army was nearly annihilated. Between this period and the end of September the French generals were defeated in every quarter: Davoust by Walmoden; another body of French by Platoff, on the 29th; Jerome by Czernicheff, on the 30th; and Lefebvre by Thielemann and Platoff, at Altenburg.

These defeats, which were gradually hemming Napoleon round by his enemies in Dresden, were the direct result of the active aid of Great Britain to the Allies. Sir Charles Stewart, the brother of Lord Castlereagh, had been dispatched to the headquarters of the Allies. By means of the abundant supplies of arms and money, the population of Hanover was raised; Bernadotte was kept firm to his support of the Coalition; and, by Sir Charles, he was also urged to march on Leipsic, and be present at the final conflict. Brigadier-General Lyon was sent to head the troops in Hanover; and the Duke of Cambridge to conduct the civil government of the country. Money was supplied in abundance, in addition to military stores. Two millions were advanced to the Crown Prince of Sweden for his army, two millions more to the Russians and Prussians, and another half million to Russia to equip its fleet in the Baltic. Without these vast supplies the combined armies could not have kept their ground.

From the 24th of September till the commencement of October Buonaparte continued to maintain himself at Dresden, though the Allies were fast gathering round him. Occasionally he made a rush from the city, and on one occasion pursued Blucher as far as Nollendorf, beyond Kulm; but these expeditions only served to exhaust his troops, without producing any effect on the enemy. As he chased one body on one side, others were closing up on other sides. Seeing that he could not remain long at Dresden, and that Bernadotte and Bülow had quitted the neighbourhood of Berlin, he suddenly conceived the design of marching rapidly on that city, and taking up his headquarters there; but this scheme met with universal disapprobation from his officers, and he was compelled to abandon it. He then continued for days, and even weeks, in a state of listless apathy, for hours together mechanically making large letters on sheets of paper, or debating some new schemes with his generals; but the only scheme to which they would listen was that of retreating to the left bank of the Rhine. In fact, they and the army were completely worn out and dispirited.

The Allies now determined to close in on all sides, and compel the French to a surrender. But Buonaparte, after some manœuvres to bring Blucher to action—that general and the Crown Prince of Sweden having crossed to the left bank of the Elbe—found it at length necessary to retreat to Leipsic. He reached that city on the 15th of October, and learned, to his great satisfaction, that whilst his whole force would be under its walls within twenty-four hours, the Austrians were advancing considerably ahead of the Prussians; and he flattered himself that he should be able to beat the Austrians before the other Allies could reach them.

Leipsic is nearly surrounded by rivers and marshy lands, and only, therefore, accessible by a number of bridges. The Pleisse and the Elster on the west, in various divisions, stretch under its walls; on the east winds far round the Parthe; on the south only rise some higher lands. On the 16th of October, at break of day, the Austrians attacked the southern or more accessible side with great fury, headed by Generals Kleist and Mehrfeldt, and were opposed by Poniatowski and Victor. Buonaparte was soon obliged to send up Souham to support these generals. Lauriston also was attacked by Klenau at the village of Liebertvolkwitz. After much hard fighting, Buonaparte ordered up Macdonald, who broke through the Austrian line at the village of Gossa, followed by Murat; Latour-Maubourg and Kellermann galloped through with all their cavalry. Napoleon considered this as decisive, and sent word to the King of Saxony that the battle was won, and that poor dupe and unpatriotic king set the church bells ringing for joy. But a desperate charge of Cossacks reversed all this, and drove back the French to the very walls of the town. In the meantime, Blucher had attacked and driven in Marmont, taking the village of Machern with twenty pieces of cannon and two thousand prisoners. On the side of the Pleisse Schwarzenberg pushed across a body of horse, under General Mehrfeldt, who fell into the hands of the French; but another division, under General Giulay, secured the left bank of the Pleisse and its bridges, and had he blown them up, would have cut off the only avenue of retreat for the French towards the Rhine. Night fell on the fierce contest, in which two hundred and thirty thousand Allies were hemming in one hundred and thirty-six thousand French; for the Allies this time had adopted Buonaparte's great rule of conquering by united numbers.

The next day the battle paused, as by mutual consent; and as it was evident that the French must eventually retreat, this day should have been spent in preparing temporary bridges to cross the rivers; but, as at Moscow, the presence of mind of Buonaparte seemed to have deserted him. He dispatched General Mehrfeldt to the Allied monarchs, to propose an armistice, on condition that he would yield all demanded at the previous Conference—Poland, and Illyria, the independence of Holland, Spain, and Italy, with the evacuation of Germany entirely. Before he went Mehrfeldt informed him that the Bavarians had gone over in a body to the Allies. But in vain did Buonaparte wait for an answer—none was vouchsafed. The Allied monarchs had mutually sworn to hold no further intercourse with the invader till every Frenchman was beyond the Rhine.

On the morning of the 19th the battle recommenced with fury. The French were now fighting close under the walls of the town, and Napoleon, posted on an eminence called Thonsberg, watched the conflict. Till two o'clock the fight raged all along the line, round the city; and neither party seemed to make any advance. At length the Allies forced their way into the village of Probstheide, and threw the French on that side into great confusion. Ney, on the north side, was also fearfully pressed by Blucher and the Crown Prince of Sweden, and was compelled to retreat under the walls. On a sudden, as the Russians advanced also against Ney, the Saxons—ten thousand in number—went over to them with a shout. They were sent to the rear, but their cannon was at once turned against the enemy. By evening it was clear that the French could not hold their position another day. Schwarzenberg announced to the Allied sovereigns that victory was certain, and they knelt on the field and returned thanks to God. The French knew this better than their opponents, for in the two days they had fired two hundred and fifty thousand cannon-balls, and had only about sixteen thousand cartridges left, which would not serve for more than two hours, much of their artillery having been sent to Torgau. The retreat, therefore, commenced in the night. There was only one bridge prepared, of timber, in addition to the regular stone bridge, over which one hundred thousand men must pass, with the enemy at their heels. To add to the misery, the temporary bridge soon broke down. Napoleon took a hasty leave of the King and Queen of Saxony, ordered Poniatowski to defend the rear, and himself made for the bridge. It was not without much difficulty, and considerable alarm lest he should be surrounded and taken, that he and his suite got across. Then there was a terrible scene of crushing and scrambling; and the enemy, now aware of the flight, were galloping and running from all sides towards the bridge, to cut off the fugitives. Soon after Buonaparte had got over, the bridge was blown up by the French officer in charge of the mine already made, and twenty-five thousand men were left to surrender as prisoners in the town. Amongst these were Marshals Macdonald and Poniatowski; but, disdaining to surrender, they sprang, with their horses, into the Pleisse—to swim. Macdonald escaped, but Poniatowski, though he crossed the Pleisse, was again nearly cut off, and plunging into the deep and muddy Elster, was drowned. No braver man perished in these tragic campaigns; both Allies and French in Leipsic followed his remains to the tomb, in sincere honour of his gallantry. The triumph of the Allied monarchs was complete. They met in the great square of the city, and felicitated each other. The King of Saxony was sent, without any interview, under a guard of Cossacks to Berlin, and at the General Congress he was made to pay dearly in territory for his besotted adhesion to the invader of Germany. In this awful battle the French lost three hundred guns. The slain on both sides amounted to eighty thousand, and thousands of the wounded lay for days around the city, exposed to the severe October nights, before they could be collected into lazarettos; and the view of the whole environs of Leipsic, covered with dead, was fearful.

On the 23rd of October Napoleon reached Erfurt, whose fortifications afforded him the means of two days' delay, to collect his scattered forces. As they came straggling in, in a most wretched condition, and without arms, his patience forsook him, and he exclaimed, "They are a set of scoundrels, who are going to the devil! I shall lose eighty thousand before I get to the Rhine!" In fact, he had only eighty thousand men left, besides another eighty thousand in the garrisons in the north of Germany—thus also lost to him. Of his two hundred and eighty thousand men, had utterly perished one hundred and twenty thousand. He sent orders to those in the garrisons to form a junction in the valley of the Elbe, and so fight their way home; but this was not practicable; and in a few months they all surrendered, on conditions. He here dismissed such of the Saxons and Baden troops as remained with him, and offered the same freedom to the Poles; but these brave men—with a generosity to which the betrayer of their country had no claim—refused to disband till they had seen him safe over the Rhine. Murat, with less fidelity, took his leave again, on the plea of raising troops on the frontiers of France to facilitate Napoleon's retreat, but in reality to get away to Naples and make terms for himself.