We've not done a great deal of campaign testing, however the province taken away from the Bourioi actually became their own state later in the timeline. This was the Norikoi/Norici, famous for their steel. Even if the risk of the A.I. turning them into the 'white death' wasn't a factor, the sovereignty of the removed province is a valid reason to remove it, too. The core Bouiroi homeland (Bohemia/Moravia) is located in the remaining 2 provinces so they'll start out right where they were historically.
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