Jack of Harts

The Russians and Chinese colonized the planets and moons of Alpha Centauri B.  Between the two polities, they basically control the entire system.  Only a handful of colonies are from nations not affiliated with those two powerhouses, and none of them have official ties with the Western Alliance.  Unofficial ties are a completely different matter of course.  Even Russian and Chinese colonists love Alliance trade goods after all, especially the proscribed stuff.