Pontiac (Ottawa leader) he had relatives. Pontiac continued to encourage militant resistance to British occupation among the Illinois and Wabash tribes, and to recruit French colonists as allies. According to historian Richard White, it was during this time that Pontiac exerted his greatest influence, developing from a local war leader into an important regional spokesman. After the failure of the siege of Fort Detroit, the British initially thought that Pontiac was defeated and would trouble them no longer, but his influence continued to grow. The British had successfully pacified the uprising in the Ohio Country, but British military dominance was tenuous. They decided
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