Training Center Militias:
Summary:
Use the trained soldiers in the Training Centers as the militias for each region.
Details:
The militia defending each region would be those soldiers trained in the training centers of that region. A region lord could not recruit militia as they do now. The only way for a lord to add more militia would be to build another training center. And then the militia would be those men currently trained at the center and waiting to be picked up by a noble. A unit abandoned by a noble as militia would disappear each week by 10%, 25%, or 50% of it's size until it is less than 10 men when it would disband entirely. Militia units killed in battle would be removed from the training center, thereby reducing the size of the militia.
Benefits:
The amounts of militia defending cities has long been a major issue that we've been trying to fix. Rich cities are basically impossible to break for a single nation. Even the current fix doesn't fully fix that. This would reduce the size of militias to only the amount of trained men in each center, setting an upper limit to how many militia you could have in any region.
Possible Downsides/Exploits:
A successful raiding campaign that attacks rural regions could reduce the recruiting prospects of nobles in the cities. Though that would force realms to defend their rural regions, so maybe not a downside/exploit?
Skilled infiltrators could blow up recruitment centers and reduce militia sizes.
Numerous raids could kill the trained militia in a city, making it difficult for defending nobles to recruit any new units.
Training centers in high demand and often drained would not of course be available to defend their home region, reducing the militia guarding their home region.
The in universe lore of men defending their distant frontier region and then suddenly arriving in the capital when they are recruited to follow a lord could be...complicated.
