In 1811 the regiment was joined by its other companies. In the action of Fuentes d’Onor it was warmly engaged; repeatedly and powerfully assailed by the enemy, it was all but overpowered in the defence of the village, when, happily, the Seventy-fourth and Eighty-Eighth regiments arrived to its support, and so the post was retained. The corps was afterwards detached as a reinforcement to the army of Marshal Sir William Beresford, and subsequently, in the army of Lieutenant-General Rowland (afterwards Viscount) Hill, was employed in the southern provinces of the Peninsula, keeping in check the French under Marshal Soult, and otherwise covering the operations of the grand army of Wellington. It helped to disperse and destroy a considerable detachment of the enemy which had been surprised at Arroyo-del-Molinos. It was more especially commended for the exceeding gallantry it displayed in the capture of Fort Napoleon, embraced in the action and commemorated in the word “Almaraz.” At the battle of Vittoria it suffered very severely in the loss of nearly 400 men and officers; but the most grievous loss was felt in the death of its Lieutenant-Colonel, the Hon. Henry Cadogan, who largely enjoyed the esteem of the soldiers. He “fell mortally wounded while leading his men to the charge, and being unable to accompany the battalion, requested to be carried to a neighbouring eminence, from which he might take a last farewell of them and the field. In his dying moments he earnestly inquired if the French were beaten; and on being told by an officer of the regiment, who stood by supporting him, that they had given way at all points, he ejaculated, ‘God bless my brave countrymen,’ and immediately expired.” The Marquis of Wellington thus gave effect to his own regrets in the official dispatch communicating his fall:—“In him His Majesty has lost an officer of great zeal and tried gallantry, who had already acquired the respect and regard of the whole profession, and of whom it might be expected, that if he had lived he would have rendered the most important services to his country.”