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[Star Wars] I've lost track of the various warring factions over the time-line. Would someone sum them up?

I know the Republic became the Empire, and I'm pretty sure the Rebel Alliance fought against the Empire (but not the Republic?). I'm not sure where the Separatists fit in, and I'm thinking there are some more that I've overlooked, like what did the Empire become? 

I'd love to see a playbill of the various warring factions. Key members/leaders are optional but appreciated.
gpt
THE FINAL YEARS OF THE REPUBLIC

* **Galactic Republic**: Not quite the Federation. We're even crappier.
   * **Jedi Knights**: magical space knights who are sworn to uphold the ideals of the Republic.
* **Confederacy of Independent Systems** ("Separatists"): after the disastrous response to the Trade Federation's blockade of Naboo, many systems lost interest in being part of the Republic, and opted to secede. This move was backed by power-hungry monied interests who saw an opportunity for profit.
* Various others:
   * **Organized Crime**: very influential in the less-settled Fringe; see the Hutts, the Pykes, Black Sun, etc. After being cast aside by his master, Darth Maul builds a power base for himself by strongarming various gangs. He calls his outfit the Shadow Collective/>!Crimson Dawn.!<
   * **Corporate Sector**: a neutral region mostly ruled by large business interests.
   * **Nightsisters**: a shadowy matriarchal cult that mostly keeps to Dathomir, but they did wind up playing some role in the Clone Wars.
   * **Mandalorians**: a warrior culture from Mandalore. Was heavily divided during the Clone Wars; on the one hand they didn't really benefit from the war, but on the other hand they have a long and unhappy history with the Republic.
   * **Zygerrians**: a culture built entirely on slavery. Another mostly-neutral power that got mixed up in the Clone Wars.

AFTER THE END OF THE CLONE WARS

* **Galactic Empire**: the reformed Republic, a largely humanocentric, authoritarian dictatorship. Governed in secret by the Sith Order, a shadowy cult that is the ancient archenemy of the Jedi Order. Or, like, two Sith. Which is technically 100% of them.
* **Rebel Alliance** (Alliance to Restore the Republic): not content with living in an authoritarian hellhole, the Rebels met in secret to discuss bringing back the old days of the Republic by force. Not... *the* Force, just, you know, declaring war. The core of the Alliance (at least in the old canon) came from Alderaan, Chandrila, and Correlia, but naturally a lot of people weren't happy with the Empire, so there were other rebel factions:
   * **Anoat Uprising**: a rougher, more brutal Rebel faction from the Anoat sector, which was utterly devastated by the Imperial war effort.
   * **Onedron Partisans**: an even rougher and more brutal faction on Onedron, led by Saw Gerrera. Kind of evokes the mujahideen during the Soviet invasion of Afghanistan, with the implication that them winning against the Empire wouldn't be entirely a good outcome either.

AFTER THE FALL OF THE EMPIRE

* The **New Republic**: kind of what it says on the tin.
   * **The Resistance**: a private army created by Leia Organa to get around the bureaucratic obstacles that prevented a military response to the First Order's activities. In theory they have the New Republic's backing but it's implied their mission is not currently a priority for the New Republic (like McBain trying to go after Mendoza, sort of) 
* The **First Order**: fanatical remnants of the Empire, mostly descendants of its exiled military elite (plus brainwashed child soldiers to pad out their ranks). Later partner with the **Sith Eternal**, yet another shadowy evil cult.