I am making a leap with it, but I think he is allied with the outer colonies because Locke is with ONI, and chief [i]is[/i] from the outer colonies. The inner colonies are being fed propaganda that seems to be against the chief. Yet again, we don't know his motives. Also, they never specified what alien group the negotiations were with. It's not the Swords of Sanghelious, because we have a peace treaty, so is it the Storm group?