The pursuing American army included the Marquis de Lafayette, who was under orders from Washington to hang Arnold summarily if he was captured. British reinforcements arrived in late March led by William Phillips who served under Burgoyne at Saratoga. Phillips led further raids across Virginia, including a defeat of Baron von Steuben at Petersburg, but he died of fever on 12 May 1781. Arnold commanded the army only until 20 May, when Lord Cornwallis arrived with the southern army and took over. One colonel wrote to Clinton concerning Arnold: "There are many officers who must wish some other general in command." Cornwallis ignored Arnold's advice to locate a permanent base away from the coast, advice that might have averted his surrender at Yorktown.