I'm just working up a Bretonnian castle in Warhammer Fantasy Roleplay.
It overlooks a small harbour, and town, of around 4,000 souls, which trades in hides, vellum, and a small quantity of agricultural produce.
Thanks to regressive taxation the output of the multiple smallholdings is extremely weak. Since every peasant has insufficient capital or incentive to improve their methods.
My question is, how large a force should the castle command? I'm assuming that the number of skilled men at arms that can be supported is roughly equivalent to the number of skilled tradesmen the town can support. And the number of knigfhts should be 1/20th this number.
Thus our castle contains between 80-100 men at arms, and 5 knights. To which I've appended (for narrative reasons) 4 templars, and 6 squires.
At rumour of war the Visconte can call up maybe double this number of inferior quality troops with the same classifications, as well as perhaps 50 crossbowmen and artisans to construct a trebuchet, with which to guard the harbour. Plus 2,000 fuedal levied peasants.
Thoughts? Looks pretty weak tea.