Suddenly, two heavy bodies of light and heavy cavalry broke from the cloud of dust and fell upon them. Twelve hundred Frenchmen were trampled down and, as the cavalry rode on, the third division ran forward, at the double, through the gap that they had formed. Line after line of the French infantry was broken and scattered, and five of their guns captured by one of the squadrons. Two thousand prisoners were taken, and the three divisions that Maucune had commanded were a mass of fugitives. In the meantime, a terrible battle was raging in the centre. Here Clausel had gathered three fresh divisions and, behind these, the fugitives from the left rallied. He placed three others, supported by the whole of the cavalry, to cover the retreat; while yet another remained behind the French Hermanito. Pack's Portuguese were advancing against it, and arrived nearly at the summit, when the French reserves leapt from the rocks and opened a tremendous fire on their front and left flank; and the Portuguese were driven down the hill, with much loss. Almost at the same moment, one of the regiments of the 4th division were suddenly charged by 1200 French soldiers, hidden behind a declivity, and driven back with heavy loss. For a moment, it seemed that the fate of the battle might yet be changed; but Wellington had the strongest reserve, the sixth division was brought up and, though the French fought obstinately, Clausel was obliged to abandon the Hermanito; and the army began to fall back, the movement being covered by their guns and the gallant charges of their cavalry. The whole of the British reserves were now brought into action, and hotly pressed them; but, for the most part maintaining their order, the French fell back into the woods and, favoured by the darkness, and nobly covered by Maucune, who had been strongly reinforced, they drew off with comparatively little loss, thanks to the Spaniards' abandonment of the fort guarding the ford at Alba. Believing that the French must make for the ford of Huerta, Wellington had greatly strengthened his force on that side and, after a long march to the ford, was bitterly disappointed, on arriving there at midnight, to find that there was no sign of the enemy; although it was not until morning that he learned that they had passed unmolested over the ford of Alba. Had it not been for the Spanish disobedience and folly, Marmont's whole army would have had no resource but to surrender.