Event · Significance tier 2
Smallpox devastates the American army in Canada
Smallpox spread through the northern army amid inconsistent inoculation policy, contributing to collapse and retreat from Canada.
- Category
- armed conflict
- Episode relations
- 1
Episode coverage
Episode 2
set piece · spoken: caption verified
Visual check: sequence context
Why this coverage: The episode gives an extended account of smallpox, quarantine and inoculation, and the epidemic's destructive role in the retreat from Canada.
Caption entry: 01:36:16.871 · 01:41:20.841
Reviewed sequence context: ep2-cue-09-smallpox
Why it matters
Disease was an active military force, shaped by policy, immunity, mobility, fear, and unequal exposure rather than a background statistic.
Why this tier
The epidemic materially constrained a major campaign and forced leaders to confront inoculation as military policy.
Counterfactual test: A healthier and better supplied northern army might have prolonged the invasion even after the failed assault on Quebec.