While the emperor took possession of Madrid, and endeavored to reduce the undisciplined spirit of the capital, General Gouvion St. Cyr had been appointed to bring Catalonia to submission. A man of skill and prudence, though obstinately attached to his own opinions, St. Cyr was never a favorite with Napoleon, though he knew his merit. He had entrusted him with the duty of reducing an isolated province, where his command ran no risk of being interfered with by contradictory wishes or orders. The general delayed some time at the siege of Rosas, which he was anxious not to leave in his rear, and when he at last advanced towards Barcelona, General Duhesme and his garrison were short of provisions. On his approach the blockade was raised, and, on the 15th December, General Vives offered battle to St. Cyr at Cardeden, before Barcelona. The French having left their artillery behind, so as to advance more quickly, the order was given to open a road through the enemy's ranks with the bayonet. The soldiers obeyed, keeping their heads down as they advanced under the fire of the Spanish; the latter were unable to resist the impetuosity of such an attack, and the columns of our troops passed through the enemy's lines, which were soon broken and scattered. The Spanish artillery fell entirely into our hands, and next day the French entered Barcelona. On the 21st the entrenched camp on the Llobregat was taken, and complete dispersion of the Spanish troops in Catalonia soon followed, only a few places still holding out, which General Gouvion St. Cyr prepared to besiege. The English, however, henceforward united to the cause of the Spanish insurrection by a solemn declaration, published on the 15th December, and everywhere the objects of Napoleon's most persistent hatred, had not yet undergone the shock of his arms. Having only imperfect information as to Sir John Moore's operations, the emperor had reckoned with certainty upon the retreat which that general began at the moment of the attack upon Madrid, when he found that it was absolutely impossible to concentrate his forces in time for resistance. Moore was not hopeful as to the results of the campaign, and had little satisfaction in his Spanish auxiliaries, who always distrusted foreigners, even when allies; when urged by the Junta, however, and after receiving instructions from England, he advanced towards Valladolid, relinquishing his line of retreat upon Portugal, and directing his march to Corunna. From some intercepted despatches he believed he might surprise Marshal Soult in the kingdom of Leon, with inferior forces to his own; and, at the same time, ask Sir David Baird to join him with his troops, and sent to ask the Marquis Romana for reinforcements. On the 21st December, the English army, more than 25,000 men strong, had reached Sahagun, near to Marshal Soult's position.