How do I figure out the population numbers in my various kingdoms?
I've seen the population growth tables for the entire world showing how the population grew and died off over time (yes Genghis, I'm talking about you).
But how do I figure out the number of people in my various kingdoms. I can't just say it was a large million people strong population with medieval society and knowledge in an area the size of say, Denmark. (this is just an example).
To work out the number of soldiers I could legitimately field, or the number of large cities, or how much farmland I need etc I need to figure out just how many people are in the country.
Is this one of the times where the answer is however many you want? Or is there a somewhat 'established' calculation of people per area per time period/society level?
Or is the answer the reverse? Figure out how much farmland you have, that can feed the cities and soldiers. Work it out by number of mouths I can feed?
Does anyone have a handy 'farming productivity through the ages' almanac?