Here's what I have as my personal but well-threshed-out list. It meshes with several major campaigns (Shrouding the Light, Awakenings, etc) and more or less with canon. You can use it if you want.
I make two major stipulations:
1) It took a while (on the order of 3 years or so) for the GTA to finally collapse; holding on to as much order as possible (not to mention the hope of somehow contacting Sol) would be imperative to many people for at least a while.
2) It also took a while to finish ousting the Shivans, due in large part to the massive instability of the shattered Terran Alliance, and the endless attacks on Terran and Vasudan assets, military and civilian, by HOL fanatics.
So you'll notice some of the dates and events I give -- which are intelligent guesses on my part, but most of which are NOT CANON -- may seem much, much later than the ones you're used to thinking.
History is not clean, simple or quick now. It stands to reason that it will not be in the future, either, especially when terrorism and the loss of two homeworlds are involved.
GTA Remnants: (After about mid-October 2338 GTA officially croaks and all Remnants become self-governing)
- Delta Serpentis
- Beta Aquilae (Antarans and Vasudans both try to woo BA, but it remains neutral; hence its suitability as the location for the signing of BETAC)
- Vega (Before '38, jointly held by GTA and PVE; independent 10/38-5/39; willingly becomes Vasudan Imperial protectorate 5/18/39)
- Capella (Same as Vega; becomes Vasudan protectorate 5/21/39)
PVN/Vasudan Imperium: (Khamudi IV assassinated 3/26/39; Khonsu ascends to the throne 3/30/39, barely avoids assassination himself; dissolves Parliament 4/21/39 after over a dozen of them are found guilty of treason, conspiracy and regicide)
- Vasuda
- Deneb
- Aldebaren
- Alpha Centauri
- Altair (HOL schism 3/15/38; moderate factions leave to parts unknown or surrender; Altair retaken by PVN 1/13/39)
- Vega (after 5/18/39; protectorate)
- Capella (after 5/21/39; protectorate)
Uninhabited or too sparsely inhabited to matter until well into the Reconstruction:
- Dubhe
- Alphard
- Ross 128 (Shivan-held pocket until June '38; as seen in Awakenings)
- Gamma Draconis
Luyten New Alliance: (Mar 4, 2335 - Jul 8, 2358)
(cut off from GTA by Shivans in Ross 128, hence the early independence date)
- Luyten
- Wolf 359
- Barnard's Star
- Laramis (Shivan-held pocket until July '38)
Antares Federation: (Aug 22, 2336 - Jul 8, 2358)
(not until '36 since it would have taken a while for the faith in the GTA to officially crack)
- Antares
- Ribos
- Beta Cygni
- Ikeya (Shivan-held until Sep '36)
Regulus Syndicate: (Jul 18, 2335 - Jul 8, 2358)
(dates given are official; unofficial existance started much earlier and is rumored to persist to this day)
- Regulus
- Polaris (Shivan held until 4/37)
- Sirius (Shivan pocket until 3/37; nominally PVN but de facto Regulan until 5/39; ceded to Regulus Syndicate thereafter)
Adharan Coalition: (Mar 10, 2339 - Jul 8, 2358)
(Took a while to get around to clearing the Shivans from that sector of space, wasn't finished until late '38. Adharan colonies were originally Regulan client states; tax-gouging on the Regulans' part led to independence and the Regulan-Adharan War, which the Adharans barely won due to financial assistance on the part of the Antarans and Delta Serpentis, as well as the timely loss of the RSD Lutzen on the other side of an uncharted jump node.)
- Adhara
- Mirfak
- Epsilon Pegasi
- Procyon