On the 14th of May, the battalion returned to its former cantonments in Albergaria, where orders were received increasing its establishment to twelve hundred rank and file. Marshal Beresford, in the meantime, was continuing the blockade of _Badajoz_; but receiving information that Marshal Soult was advancing from Seville to its relief, he raised the siege on the 15th of May, and having concentrated his force, marched to meet the enemy. On the following day, the battle of _Albuhera_ was fought, and the British gained a brilliant but hard-earned victory. In the night of the 17th, Marshal Soult left Badajoz to its fate, and commenced his retreat towards Seville. Viscount Wellington now gave orders for _Badajoz_ to be again closely invested. To assist in these operations, the brigade, of which the NINETY-SECOND formed part, was appointed the first in the second division of the army, under Lieut.-General Rowland (afterwards Viscount) Hill, at this time in Spanish Estremadura, covering the siege of Badajoz. The battalion, under Lieut.-Colonel Cameron, marched, on the 25th of May, from Albergaria for the Alemtejo, crossed the Tagus at Villa Velha, and the Guadiana above Badajoz, and joined the second division in front of Albuhera, on the 10th of June, about ten days after the second siege of Badajoz had been commenced. Its effective strength consisted of fifty-six serjeants, sixteen drummers, and eight hundred and twenty-five rank and file. Marshal Marmont, with the French army of Portugal, having effected a junction with that of the south, under Marshal Soult, they advanced to relieve Badajoz; Viscount Wellington found it therefore necessary to relinquish the siege, and to withdraw the allied army across the Guadiana. Accordingly, the second division, on the 16th of June, broke up from its bivouac in front of Albuhera, marched by Valverde, recrossed the Guadiana, and arrived at Torre do Mouro on the 20th of June, where the principal part of the British army was drawn up in position, with its right upon Elvas and the left on Campo Mayor. The division broke up from the bivouac at Torre do Mouro on the 21st of July, marched to Elvas, and on the following day went into quarters in Borba, from whence it marched on the 1st of September, arriving on the 3rd of that month at Portalegre. Meanwhile the main body of the army, under Viscount Wellington, had crossed the Tagus and invested _Ciudad Rodrigo_. Towards the end of September, Marshal Marmont, having received large reinforcements, advanced to Ciudad Rodrigo, and, after a partial engagement at El Bodon on the 25th of September, Viscount Wellington withdrew his army to his former position on the Coa. On the 7th of October, a draft of one hundred and ninety-nine rank and file was received from the second battalion. The second battalion embarked at Belfast on the 10th of October, and arrived on the following day at Irvine in North Britain.