Now, thinking of it...
It is possible to TURN OFF possibility of splitting unit. Just set them to SMALLER size (it probably have no other purpose). So if you set even CORPS as battalion size, it should not be possible to split.
Also, have you tried setting leaders, and ships to belonging to unused Nation? Pilots needs in-game pool, but other things can use virtual Nation, if they are working in-game. There are 3 free slots in editor.
ORIGINAL: Gary Childress
Makes me think no one really cares one way or the other about this mod. Of course that may well be true. Maybe I'm just wasting my time working on this. Probably everyone would rather play something historically based instead of a bunch of fantasy nonsense.
I would think of it as a tool for teaching GC. If you seriously reduce timespan, and reinforcements, it will be quick learning tool for whole map composition, and available forces.