Upon Boone's return to Boonesborough, some of the men expressed doubts about Boone's loyalty, since he had apparently lived happily among the Shawnees for months. Boone responded by leading a preemptive raid against the Shawnees across the Ohio River, and then by helping to successfully defend Boonesborough against a 10-day siege led by Blackfish, which began on September 7, 1778. After the siege, Captain Benjamin Logan and Colonel Richard Callaway—both of whom had nephews who were still captives surrendered by Boone—brought charges against Boone for his recent activities. In the court-martial that followed, Boone was found "not guilty," and was even promoted after the court heard his testimony. Despite this vindication, Boone was humiliated by the court-martial, and he rarely spoke of it.