Well the answer is simple:
Give Gallia someone strong other than the Brets to fight. As we know, Gallia now has pushed through Leeds, making its Tau Front rather dead!. The colonials would now be mostly interested in shooting down the Maltese and have less interests with the Gauls.
The new strong foe would be (I know this will sound silly) The Council, because these both factions aren't doing what they are supposed to do, brawl inside Gallia not in Leeds.
The solution is: 4 IDs, 2 for both factions working on the Bretonian Front, and 2 for both of them working inside Gallia, the first 2 should be only accessible by the officials. This way more people would join both factions and eventually, give some life to gallia..
