During 1811, Victor's force was diminished because of requests for reinforcement from Soult to aid his siege of Badajoz. This brought the French numbers down to between 20,000 and 15,000 and encouraged the defenders of Cádiz to attempt a breakout, in conjunction with the arrival of an Anglo-Spanish relief army of around 12,000 infantry and 800 cavalry under the overall command of Spanish General Manuel La Peña, with the British contingent being led by Lieutenant-General Sir Thomas Graham. Marching towards Cádiz on 28 February, this force defeated two French divisions under Victor at Barrosa. The Allies failed to exploit their success and Victor soon renewed the blockade. From January through March 1811, Soult with 20,000 men besieged and captured the fortress towns of Badajoz and Olivenza in Extremadura, capturing 16,000 prisoners, before returning to Andalusia with most of his army. Soult was relieved at the operation's speedy conclusion, for intelligence received on 8 March told him that Francisco Ballesteros' Spanish army was menacing Seville, that Victor had been defeated at Barrosa and Masséna had retreated from Portugal. Soult redeployed his forces to deal with these threats.