Chalkcliff is right here.
They're not politically associated with anyone as a whole. As for the separate entities, that's something that should be determined in-game, really. The NPC in Wiltun who takes people to Blue Lagoon suggests that there's some kind of understanding there, at least, but that's Elyon's realm at the moment, if people want to do the legwork to find that out IC.
And of course Fort Cystana is still establishing itself, so it's probably not entirely clear to just anyone at this point yet.
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