I'm currently running a Star Wars True20 play-by-post campaign based on a very similar premise to the one in this thread. Here is an excerpt from a discussion I had with a few of the players while the campaign was still under construction. It describes the background assumptions and some of the historical and political details:
"The campaign takes place a thousand years after the events of the original Star Wars trilogy. It proceeds from a counterfactual scenario: What if the Jedi Vergere repulsed the Yuuzhan Vong at Zonama Sekot, prompting Supreme Overlord Quoreal to abort the invasion of the Galaxy? I propose that, absent Vong meddling in galactic politics, the Imperial Remnant remains a credible threat to the New Republic long after the Battle of Endor, and the Galactic Civil War continues sporadically for another 100 years. At one point during the conflict, Brakiss discovers Korriban while researching Dark Side lore for his Shadow Academy. The Jedi learn of this and send a task force under Anakin Solo to uproot the Dark Jedi before they can use the hidden knowledge of Korriban to resurrect the Sith Brotherhood. During the battle, Anakin is captured and sealed within a Sith tomb, where he is driven mad by Dark Side spirits. When his siblings, Jaina and Jacen Solo, mount a rescue attempt, Anakin attacks them. Jacen is forced to kill his crazed brother, an act that sends his sister into a rage. The twins proceed to duel on the side of a Sith pyramid. Jacen throws Jaina from the side of the structure, whereupon his psychic link with her is severed. Jacen assumes that his sister has died and departs to mourn with his family. Jaina survives the fall, however, and draws on the Dark Side to heal her broken body. When she recovers, she kills Brakiss, seizes control of the Shadow Academy, commandeers the Imperial armed forces, and proclaims herself Darth Cruxia, Dark Lady of the Sith. Armed with Sith sorceries wrested from the ruins of Korriban, Cruxia leads an invasion of the New Republic, with the aim of destroying the Jedi and avenging her brother. The war claims the lives of most of the Skywalker clan and its hangers on -- Luke, Leia, Han, Chewbacca, Mara Jade. Deprived of this core of leadership, the Republic fragments, even as the Imperial Remnant overextends itself and collapses. Centuries later, the Galaxy is divided among dozens of rump interstellar states, the greatest of which are the Stellar Dominion (ruled by the Organa dynasty), the Celestial Imperium (ruled by the Solo dynasty), and the Mercantile League (an alliance of hyperurbanized Core worlds dominated by the wealthy Calrissian clan). Much of the Galaxy is barbarian wilderness, given over to Mandalorians, Echani, Ubese, and other warrior races.
The tone of the campaign is decidedly medieval. Civilization has reverted to a quasi-feudal order, and much of the population of the Galaxy lives in ignorance and squalor. Heroes are fierce and uncompromising. There is nothing metaphorical about the term Jedi Knight in this era. Force users are numerous and (with the proliferation of loosely structured traditions) unpredictably powerful. The strict Dark/Light dichotomy of previous epochs is not widely apparent. The disruption of hyperspace routes and loss of much astrometric data has rendered the Galaxy a larger and wilder place. Technology hasn't retrogressed per se, but it is superficially cruder in design and operation. In short, this is the Star Wars universe as it might have been envisioned by Frank Herbert."
"The campaign takes place a thousand years after the events of the original Star Wars trilogy. It proceeds from a counterfactual scenario: What if the Jedi Vergere repulsed the Yuuzhan Vong at Zonama Sekot, prompting Supreme Overlord Quoreal to abort the invasion of the Galaxy? I propose that, absent Vong meddling in galactic politics, the Imperial Remnant remains a credible threat to the New Republic long after the Battle of Endor, and the Galactic Civil War continues sporadically for another 100 years. At one point during the conflict, Brakiss discovers Korriban while researching Dark Side lore for his Shadow Academy. The Jedi learn of this and send a task force under Anakin Solo to uproot the Dark Jedi before they can use the hidden knowledge of Korriban to resurrect the Sith Brotherhood. During the battle, Anakin is captured and sealed within a Sith tomb, where he is driven mad by Dark Side spirits. When his siblings, Jaina and Jacen Solo, mount a rescue attempt, Anakin attacks them. Jacen is forced to kill his crazed brother, an act that sends his sister into a rage. The twins proceed to duel on the side of a Sith pyramid. Jacen throws Jaina from the side of the structure, whereupon his psychic link with her is severed. Jacen assumes that his sister has died and departs to mourn with his family. Jaina survives the fall, however, and draws on the Dark Side to heal her broken body. When she recovers, she kills Brakiss, seizes control of the Shadow Academy, commandeers the Imperial armed forces, and proclaims herself Darth Cruxia, Dark Lady of the Sith. Armed with Sith sorceries wrested from the ruins of Korriban, Cruxia leads an invasion of the New Republic, with the aim of destroying the Jedi and avenging her brother. The war claims the lives of most of the Skywalker clan and its hangers on -- Luke, Leia, Han, Chewbacca, Mara Jade. Deprived of this core of leadership, the Republic fragments, even as the Imperial Remnant overextends itself and collapses. Centuries later, the Galaxy is divided among dozens of rump interstellar states, the greatest of which are the Stellar Dominion (ruled by the Organa dynasty), the Celestial Imperium (ruled by the Solo dynasty), and the Mercantile League (an alliance of hyperurbanized Core worlds dominated by the wealthy Calrissian clan). Much of the Galaxy is barbarian wilderness, given over to Mandalorians, Echani, Ubese, and other warrior races.
The tone of the campaign is decidedly medieval. Civilization has reverted to a quasi-feudal order, and much of the population of the Galaxy lives in ignorance and squalor. Heroes are fierce and uncompromising. There is nothing metaphorical about the term Jedi Knight in this era. Force users are numerous and (with the proliferation of loosely structured traditions) unpredictably powerful. The strict Dark/Light dichotomy of previous epochs is not widely apparent. The disruption of hyperspace routes and loss of much astrometric data has rendered the Galaxy a larger and wilder place. Technology hasn't retrogressed per se, but it is superficially cruder in design and operation. In short, this is the Star Wars universe as it might have been envisioned by Frank Herbert."