After receiving reinforcements, the British attempted to make a surprise attack on Pontiac's encampment. But Pontiac was ready and waiting, and defeated them at the Battle of Bloody Run on July 31, 1763. Nevertheless, the situation at Fort Detroit remained a stalemate. Pontiac's influence among his followers began to fade. Groups of Native Americans began to abandon the siege, some of them making peace with the British before departing. On October 31, 1763, finally convinced that the French in Illinois would not come to his aid at Detroit, Pontiac lifted the siege and removed to the Maumee River, where he continued his efforts to rally resistance against the British.