Assenpfeffer said:
OTOH, this 12-mile hex = 1 province is sounding unweildy to me. While I support the use of hexes as opposed to arbitarily-bordered "provinces", doing some elementary fiddling reveals that Northern Ireland runs to about 25 of these hexes. Something like medieval France (which is the model for realms in my homebrew setting,) would run to thousands of hexes. If, in FoB, anything bigger than 7 hexes is a "large" realm... well, that's just goofy, and totally unworkable.
The book has a sidebar talking about how to adjust the maintenance costs, which are tied to the number of hexes in the realm. 7 hexes is where the maintenance costs begin to mount up higher, marking the point of "large". You can change the table to make maintenance of realms with more hexes less expensive, and thus make larger realms "normal" for your world. The sidebar covers it pretty well.
I am in the same boat; most of the 250 areas I consider single provinces would have between 8 and 15 hexes in them at 12 miles across the hex. Sub-infeudation lets me fix this for small realms, but I am not interested in re-writing all 250 just to make sure the numbers stay in balance.
Assenpfeffer said:
The question then becomes "how do you fix it?" Because in just about every other respect, FoB is sounding like exactly the book I need.
Can the numbers just be scaled up? If I make the hexes, say, 72 miles across, what other game factors will need to be changed, and can they be adjusted by the same ratio?
Well, the production numbers may not need to be changed at all. Since they are already abstract numbers that do not tie back to "X gp" or "X tons of iron", you could just keep them the same ... except...
The troop movements are tied to the production numbers and to the 12-mile size. Adjusting the 12-mile size up to 72, as you mention, makes your troops move 6x as fast. You pay resource points to move troops, so making the hexes bigger means you can move the troops 6x as far for the same cost.
Remember that bringing the cross-hex distance up to 72 miles across makes the area about 34.75 x the area of the 12-mile hexes. That needs to be the factor for any attempt to scale the resources.
You can cut the speed of the troops by dividing their movement points by the same amount you multiplied the distance. That has a funny effect, as their movement points are 7x their base movement (7x daily movement to represent 1 week), so in the sample case you presented, movement points would be 7/6 (1.1666667) x D&D movement in 5' squares. You might as well just say they can move as many hexes as squares at that point, and round off.
The resource points may take care of itself, at that point. If you don't try to scale them, then the 6x as far for the same cost makes sense.
What else ? Let's see...
The rules for units finding each other when they wind up in the same hex will likely need some attention, then. Armies are much more likely to be able to avoid each other in 3600 square miles of area than they are in 125 square miles of area.
There may well be some more subtle points I am not thinking of right away, too.