I'm looking to start a new campaign and want to come up with house rules to mirror what we know to be actual recruitment practices.

So far I've adapted some house rules from various other threads and primarily I am going to be recruiting "provincial armies" in each settlement based on that settlement's income with certain ratios (eg 1:3:1 peasant/regular/elite). My standing armies will be drawn directly from whatever is available in my provincial armies... so this should give me a reasonable mix of troops based mainly on regulars with the odd elite / peasant unit in the mix.

But I'm looking to adapt it further, however I am lacking the proper historical context/info on how these factions historically recruited. If anyone has any resources or knowledge and can assist it'd be much appreciated.

Thanks.