So I'm looking at having a Napoleonic wars type scenario, two massive empires have been fighting on and off for the better part of the past 30 years
so in accordance with the number of troops in the royal army during the Napoleonic wars, the army of the British Empire was approximately 250,000 men, and the navy was about 85,000 men. In this world there are air fleets too, Assuming the impracticability of the air force being as large as the navy, I'd assume around 30,000. so a grand total of around 365,000 men. And I'm not forgetting suppliers and non-combatant jobs such as stable masters and maintenance personnel , I've simply enrolled them as a flat 30% (119,500) of the entire military force... distributed by corps as appropriate(Much higher non-combatant air force personnel number than army for example) leaving a standing active combatant force of 246,000 men/women
How large would a heavily militarized population need to be (Somewhere around 5-7% of population, bear in mind that the united states currently has less than 1% of it's population as a military force), and as such how Dense would an empire that spans approximately the 1/3 total size of north America need to be in order to support this (Industrial society)? and how about a less militarized but still quite imperial force (1-3%)of roughly the same size representing a nation about the size of China be (Feudal society)? I'm thinking in terms of city population levels on average.
I just need help finding population densities for city placement, and some general guides for infrastructure. I'm assuming some of you have dealt with this before. I don't want non-matching numbers for population-military-area density for the sake of constancy.
So any help would be great, maybe city generators and the like.