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