Siege of Fort Detroit Siege of Fort Detroit "For the action in the War of 1812, see the Siege of Detroit" The Siege of Fort Detroit was an ultimately unsuccessful attempt by North American Indians to capture Fort Detroit during Pontiac's Rebellion. The siege was led primarily by Pontiac, an Ottawa chief and military leader. Fort Detroit had been captured by the British during the French and Indian War following the Fall of Montreal in 1760. It was on territory ceded by France to Great Britain in the Treaty of Paris in 1763 and was garrisoned by a British force during Pontiac's Rebellion. On
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