In March 1811, with supplies exhausted, Masséna retreated from Portugal to Salamanca. Wellington went over to the offensive later that month. An Anglo-Portuguese army led by the British general William Beresford and a Spanish army led by the Spanish generals Joaquín Blake and Francisco Castaños, attempted to retake Badajoz by laying siege to the French garrison Soult had left behind. Soult regathered his army and marched to relieve the siege. Beresford lifted the siege and his army intercepted the marching French. At the Battle of Albuera, Soult outmaneuvered Beresford but could not win the battle. He retired his army to Seville.