At noon, a combination of at least eight thousand men moved from the rear of the Arapiles, and formed in front of the fifth division. Lord Wellington rode to the ground, and there found the division in perfect readiness for the anticipated attack. Perceiving at once that this movement was only a demonstration of the French marshal to mask his real designs, his lordship returned to the right, which was now the interesting point of the position.
Finding his feint upon the fifth division unsuccessful, Marmont put his columns into motion, and marching rapidly by his left, endeavoured to turn the right of the allies, and thus interpose between them and Ciudad Rodrigo. Under a heavy cannonade, his front and flank, covered by a cloud of skirmishers, and supported by a cavalry force that drove in the British dragoons and light troops, pressed forward to gain the Rodrigo road. But that hurried movement was badly executed by Marmont’s generals of division. Their extension was made with careless haste, the line consequently weakened, and this false manœuvre brought on the crisis of the day. The moment for action had come, and Lord Wellington seized the opportunity and struck the blow.
At two o’clock, when the French commenced extending by their left, the allied army was thus disposed. On the right, the fifth division (Leith’s) had moved behind the village of Arapiles, and had taken ground on the right of the fourth (Cole’s); the sixth and seventh, under Generals Clinton and Hope, formed a reserve; the third division (Pakenham’s), D’Urban’s cavalry, two squadrons of the 14th light dragoons, and a corps of Spanish infantry, were in position near Aldea Tejada. Bradford’s brigade, with Le Marchant’s heavy cavalry, were formed on the right, and in the rear of the fifth. The light division (Barnard’s) and the first (the Guards and Germans) were drawn up between the Arapiles and the Tormes, in reserve. Cotton’s cavalry were formed in the rear of the third and fifth divisions; an artillery reserve, posted behind the dragoons, and in the rear of all the Spaniards, under Don Carlos D’Espana, appeared in the extreme distance, but entirely out of fire.
Marmont had remarked, and rode forward to correct the irregularity of his flank movement, and personally direct the debouchement of his third and fourth divisions from the wood that had partially concealed them. At that moment, Lord Wellington was seated on the hill-side, eating his hurried meal, while an aide-de-camp in attendance watched the enemy’s movements with a glass. The bustle then perceptible in the French line attracted his lordship’s notice, and he quickly inquired the cause.
“They are evidently in motion,” was the reply.
“Indeed! what are they doing?”
“Extending rapidly to the left,” was answered.
Lord Wellington sprang upon his feet, and seized the telescope; then muttering that Marmont’s good genius had deserted him, he mounted his horse, and issued the orders to attack.
All was instantly on the alert. The staff went off at speed to bring up the fifth and sixth divisions. The infantry stood to arms, primed and loaded, fixed bayonets, uncased the colours, and abandoning the defensive system, hitherto so admirably employed, prepared for an immediate attack.
Pakenham commended the action by advancing in four columns along the valley, assailing the left flank of the enemy, and driving it before him in great confusion. D’Urban’s Portuguese dragoons, and Harvey’s light cavalry (the 14th), protected the flank during the movement, and, when the French became disordered, charged boldly in and sabred the broken infantry. Nothing could be more brilliant than Pakenham’s advance. A level plateau of nearly eight hundred yards was to be crossed before the assailants could reach the heights, whither Fox’s division were marching hastily to occupy the ground.