Province Size?

[tinkthank]

I would like to think of it as a county as well, since this feels right in terms of population, magic sites, etc.

However, militia and heavy troops can only move 1 province in a month. If such a unit can march only 10 miles per day (which is shabby), that would still be about 300 miles a month, or about 450 kilometers.

That is somewhere between the breadth of England and Germany.

See what I mean? Either province is too small to allow meaningful map-movement restrictions, or it is too large to be a platform which can handle PD and battles.