During the Race to the Dan, Kościuszko had helped select the site where Greene eventually returned to fight Cornwallis at Guilford Courthouse. Though tactically defeated, the Americans all but destroyed Cornwallis' army as an effective fighting force and gained a permanent strategic advantage in the South. Thus, when Greene began his reconquest of South Carolina in the spring of 1781, he summoned Kościuszko to rejoin the main body of the Southern Army. The combined forces of the Continentals and Southern militia gradually forced the British from the backcountry into the coastal ports during the latter half of 1781 and, on 16 August, Kościuszko participated in the Second Battle of Camden. At Ninety-Six, Kościuszko besieged the Star Fort from 22 May to 18 June. During the unsuccessful siege, he suffered his only wound in seven years of service, bayonetted in the buttocks during an assault by the fort's defenders on the approach trench that he was constructing.