Tactically, Soult planned his battles well, but often left too much to his subordinates. Wellington said that "Soult never seemed to know how to handle troops after a battle had begun". An example of this was at the Battle of Albuera, where he brilliantly turned Beresford's flank to open the battle, yet when he found himself facing unexpected opposition from British and Spanish troops, he allowed his generals to adopt a clumsy attack formation and was beaten. Another example of his strengths and weaknesses can be seen at the Battle of the Nive. Soult recognized Wellington's strategic dilemma and took advantage by launching surprise attacks on both wings of the Anglo-Allied Army. But French tactical execution was poor and the British general managed to fend off Soult's blows. Sloppy staff work marred his tenure as Napoleon's chief of staff in the Waterloo campaign.