Kudos to Brennus for researching an alternative Briton faction, rather than throwing out the Caledonians again.

I am not convinced, though. "Stopping the expansions of another faction" is a poor reason for spending a faction slot. There's other ways of doing that. Also, if they start out at war, you are most likely merely delaying the problem until one of them beats the other. Lastly, faction expansion is probably going to be different in EB2 because the A.I. is programmed differently.