The third assault was levelled again on the British right—where the infantry awaited it, formed in a double line of squares, placed chequerwise, and protected in front by a battery of thirty field pieces. The French cuirassiers charged the artillerymen and drove them from their guns; and then rode fiercely on the squares behind. These remained steadfast until the enemy were within ten yards of them, and then fired with deadly effect. The cavalry gave back—rallied again, and renewed their charge: this they did several times—and always with the like result. Sometimes they even rode between the squares, and charged those of the second line. At length protracted exposure to such cross fire completed the ruin of these fearless cavaliers. The far greater part of this magnificent force was annihilated in this part of the battle.
When the relics of the cuirassiers withdrew, the French cannonade opened once more furiously all along the line; and the English were commanded to lie flat on the ground for some space, in order to diminish its effects. Lord Wellington had by this time lost 10,000, Buonaparte at least 15,000 men. It was now half-past six o'clock. The heads of Prussian columns began to be discerned among the woods to the right of the French. It was obvious, that unless a last and decisive onset should drive Wellington from the post which he had continued to hold during near seven hours of unintermitting battle, his allies would come fully into the field, and give him a vast superiority of numbers wherewith to close the work of the day. Napoleon prepared, therefore, for his final struggle. Hitherto he had kept his guard, the flower of his fine army, out of the fray. He now formed them into two columns,—desired them to charge boldly, for that the Prussians, whom they saw in the wood, were flying before Grouchy—and they doubted not that the Emperor was about to charge in person at their head. He, however, looked on, as they put themselves in motion, and committed them to the guidance of Ney, "the bravest of the brave," whose consciousness of recent treason must have prepared him, even had his temper been less gallant, to set all upon the cast. Four battalions of the Old Guard only remained as a reserve; and were formed in squares to protect the march of the columns.
The English front by this time presented not a convex line, but a concave, either wing having gradually advanced a little in consequence of the repeated repulses of the enemy. They were now formed in an unbroken array, four deep, and poured on the approaching columns (each man firing as often as he could reload) a shower which never intermitted. The wings kept moving on all the while; and when the heads of the French columns approached, they were exposed to such a storm of musketry in front and on either flank, that they in vain endeavoured to deploy into line for the attack. They stopped to make this attempt, reeled, lost order, and fled at last in one mass of confusion.
The Duke of Wellington now dismounted, placed himself at the head of his line, and led them, no longer held to defence, against the four battalions of the Old Guard—the only unbroken troops remaining—behind whom Ney was striving to rally his fugitives.
The Marshal, at Wellington's approach, took post once more in the van, sword in hand, and on foot. But nothing could withstand the impetuous assault of the victorious British. The Old Guard also were shaken. Napoleon had hitherto maintained his usual serenity of aspect on the heights of La Belle Alliance. He watched the English onset with his spy-glass—became suddenly pale as death—exclaimed, "They are mingled together—all is lost for the present," and rode off the field, never stopping for a moment until he reached Charleroi.
Hardly had the English advanced for this fatal charge, when Blucher's columns, emerging from the woods, were at length seen forming on the right of the French, and preparing to take part in the battle. Their cannonade played on the flank of the Old Guard, while the British attack in front was overwhelming them. The fatal cry of sauve qui peut was heard everywhere: the French were now flying pellmell in the most woeful confusion. Blucher and Wellington met at length at the farmhouse of La Belle Alliance; and the Prussian eagerly undertook to continue the pursuit during the night, while the English General halted to refresh his weary men.
The loss of Wellington's army on this great day was terrible: 100 officers slain (many of the first distinction), and 500 wounded, very many mortally; and of rank and file killed and wounded, 15,000. The Duke himself had been, all through the day, wherever the danger was greatest; and he alone, and one gentleman besides, of all a very numerous staff, came off the ground unhurt.
Of the 75,000 men whom Napoleon conducted to this last and severest of his fields, what with the slain and the wounded, and those who, losing heart and hope, deserted and fled separately to their homes, not more than 30,000 were ever again collected in arms. The Prussians followed hard on the miserable fugitives, and in every hamlet and village, for many miles beyond La Belle Alliance, cut down the lingerers without mercy.
Napoleon at length halted at Philippeville: from which point he designed to turn towards Grouchy, and take in person the command of that remaining division, leaving Soult to re-assemble and rally, at Avesnes, the relics of Waterloo. But hearing that Blucher was already at Charleroi (which was true), and that Grouchy had been overtaken and made prisoner (which was false), the Emperor abandoned his purpose, and continued his journey, travelling post, to Paris.
On the 19th the capital had been greeted with the news of three great victories, at Charleroi, at Ligny, and at Quatre-Bras—100 cannon fired in honour of the Emperor's successes—his partisans proclaimed that the glory of France was secured—and dejection filled the hearts of the royalists. On the morning of the 21st it transpired that Napoleon had arrived the night before, alone, at the Elysée. The secret could no longer be kept. A great, a decisive field had been fought;—and the French army was no more.