Movement priority

[Tifone]

Seems unlikely. Isn't the movement order organized by nation? All the commanders of nation x should move together unless some are magically challenged somehow, AFAIK.

[Illuminated One]

I think if two commanders from different provinces attacke the army can be split up if the enemy attacks one of the provinces on the same turn.
And it's definately not that the nation that is first in the pretender screen (F4) always moves first. I'm hoping that movement order isn't tied to the unit id, but if noone has ever had problems with it I'll stop worrying.