Robert Rogers (British Army officer) (also known as the "Treaty of 1763"). Rogers found himself once more a soldier of fortune, still on half-pay. Later, General Thomas Gage remarked that, if the army had put him on whole pay, they could have prevented his later unfit employment (Gage's terms). On 7 May 1763, Pontiac's Rebellion erupted in Michigan. Odawa war-leader Pontiac attempted to capture Fort Detroit by surprise with a force of 300 warriors. However, the British commander was aware of Pontiac's plan, and his garrison was armed and ready. Undaunted, Pontiac withdrew and laid siege to the fort. Eventually, more than 900 Indian warriors
Siege of Fort Pitt become by 1763 and how far British officers were willing to go in ignoring their own soldiers' code of warfare. A devastating smallpox epidemic plagued Native American tribes in the Ohio Valley and Great Lakes area through 1763 and 1764, but the effectiveness of these instances of efforts to spread smallpox remain unknown. After extensive review of surviving documentary evidence, historian Francis Jennings concluded the attempt at biological warfare was "unquestionably effective at Fort Pitt"; Barbara Mann deduced "it is important to note that the smallpox distribution worked"; Howard Peckham noted the resulting fatal epidemic "certainly affected their vigorous prosecution