Because I am silly that way, I did some rough estimates of the population sizes and potential for liege lords - including Key Players in the Raven's Purge campaign - to extract taxes from those populations. This is mostly inspired by the Stronghold rules. Like, if the players can build functions and recruit troops to their Stronghold, surely, so can Kartorda or Zertorme...but how much? Well, one can't know that without knowing how much taxes they might be able to gather, and that, in turn, is determined by how big the population is.
And my impression is that the population is really small - even if one assumes that the villages marked on the map are the places with really big populations. Armies in this setting will number in the hundreds, not thousands.
I like that!