The Terran "Alliance"
Update: There is now a wiki entry for The Terran Republic, which supercedes this.
Increasingly I think the so-called Terrans only hold the J2 cluster around Earth, ten worlds, plus the four-world cluster between that and the Ring, even though they claim all the worlds behind that.
I say "so-called Terrans" because all the worlds are settled by people from Earth, but they probably don't call themselves "Terrans" but rather whatever the Chinese or Swahili or whatever equivalent is, or "Earthers" if they're English-speakers who are talking about their ancestry but not the current political regime. Most of the breakaway worlds are non-white, or at least non-American/Russian. (I'm still figuring out how to settle the language issue, since so far I am doing the Traveller method and having Inukari be the default, with real-world English probably being Low Inukari/Brancian. Which may just be making a mess for mself.)
The Inukari and Zhdez probably recognize the independence of a lot of those worlds (and maybe some multi-world alliances), which probably doesn't make the Alliance happy at all.