American forces would probably have overpowered Canada eventually in a hypothetical 1920s war, though the advance would have been far from effortless. Canadian armed civilians and limited infrastructure beyond key crossing points would slow mobilized formations across distances much larger than European planners usually faced. Horse cavalry, then being discarded in favor of early tanks, might have been more useful in this terrain. The useful lesson is that mobility and logistics must match the geography because force totals alone are insufficient.
Notable Point · 9:26-10:30
Canadian distance complicates an invasion plan
A hypothetical 1920s American invasion of Canada illustrates how distance, transport infrastructure, and force type constrain operations.