Here is a faction (Empire vs. Empire!)

Zsinj:The Imperial Rebel

After the Imperial defeat at the Battle of Endor, the Empire began to fracture and core elements of Imperial power were brought under the control of the Imperial Ruling Council. Zsinj refused to recognize their authority and went rogue with the forces under his command, taking control of Quelii Sector from the Drackmarians, Instead of trying to seize more power and territory by force, Zsinj worked to solidify his power base. Zsinj sent emissaries to the Alliance of Free Planets and later the fledgling New Republic, causing them to initially leave him alone as they focused on nibbling at the Imperial forces based on Coruscant.

In the earliest days after the death of the Emperor, many warlords found it difficult to maintain the respect of their subjects. With most true stormtroopers remaining loyal to the Imperial Ruling Council, some warlords chose to equip regular infantry with stormtrooper armor. Zsinj took a different route, choosing instead to form his own elite military force. The Raptors combined aspects of the stormtroopers and the Emperor's Royal Guard, and they were loyal only to Zsinj. Zsinj's industrial complex created or purchased unique equipment for the Raptors, like Incom Y-4 "Raptor" transports and TIE Raptors. The Raptors defended Zsinj's holdings, protected his allies, and terrified his enemies.

Zsinj made overtures, both friendly and aggressive, to planets spread throughout the Galaxy. He also made efforts to recruit Imperial officers into his forces, focusing especially on those with an Intelligence background. Some joined him, while others, like Sair Yonka, remained loyal to Coruscant. Through subordinates like Zurel Darillian, Zsinj operated like a rebel force unto himself. Outside of his official borders, his cells controlled territories of varying size, from entire planets down to individual companies. Using a variety of aliases like "Cortle Steeze" and "Lord Houghten Ween," Zsinj built up a support network independent from his military force. During this time, Zsinj built his Dathomir shipyards, started mining operations on Dathomir's fourth moon and initiated some of his many special projects.

One of the first of his plots to bear fruit was Project Chubar. Zsinj took control of Binring Biomedical Product, a company based on the Corporate Sector world of Saffalore. There, ex-Imperial scientist Tuzin Gast and his subordinates used genetic and chemical therapy to increase the intellect of non-human species such as Gamorreans and Ewoks. Gast eventually chose to commit suicide in his lab with a small explosive device, and the most notable success of this project, an enhanced Gamorrean subject named Gamma-9104, was allowed to escape. Gamma-9104 later took the name Voort saBinring and went on to join the New Republic Defense Fleet. Despite this setback, Project Chubar continued on Saffalore and a secondary laboratory onboard Iron Fist.

Viewing both his Imperial and New Republic opponents as inferior, Zsinj eventually felt secure enough in his power to challenge the New Republic directly.

While Ysanne Isard controlled the Empire proper, Zsinj kept a respectful distance from her territory. But as the New Republic made inroads toward their conquest of Coruscant, Zsinj felt compelled to test them.

After the New Republic took Borleias, Zsinj sent a small force to probe the Pyria system. A modified Dwarf Star-class freighter bearing a name that followed New Republic conventions, Vengeance Derra IV, arrived in orbit of Borleias and used a secret backdoor in the New Republic's identification system to fake a correct ID. Only Corran Horn's instinct allowed the New Republic forces to destroy the freighter's TIE fighters and TIE Bombers and drive the freighter out of the system. The New Republic sent Rogue Squadron on a retaliatory strike against Vengeance Derra IV in orbit of Mrisst. Rogue Squadron crippled Vengeance Derra IV, hurt another Zsinj-allied transport, and destroyed a squadron of TIE fighters.

Zsinj was not the type to let this challenge go unanswered. The New Republic's reprisal set off a series of hit-and-fade strikes against the New Republic by Zsinj's forces. Zsinj seriously damaged the New Republic base on Noquivzor, believing he was hitting Rogue Squadron. This caused the New Republic to accelerate their timetable for taking Coruscant. During the subsequent Krytos virus crisis, Zsinj made efforts to steal bacta from the New Republic. Rogue Squadron and General Horton Salm's Defender Wing retook a shipment of bacta from a Zsinj-controlled space station orbiting Yag'Dhul.

Zsinj then acted on intelligence provided to him by Isard to attack a bacta convoy in The Graveyard in the Alderaan system. Termagant, one of Zsinj's Strike-class cruisers, destroyed a fake Rogue Squadron that Kirtan Loor had planned to use to turn public sentiment against the New Republic. The real Rogue Squadron destroyed Termagant, but not before Zsinj prepared a HoloNet broadcast to Coruscant claiming that he had destroyed the convoy and Rogue Squadron for humanitarian reasons. Zsinj claimed that the bacta was deliberately tainted by New Republic agents to "get rid of the xeno-trash" on Coruscant, and implored the population to support him. This HoloNet broadcast was aired worldwide, but it was quickly followed by an official report showing the survival of Rogue Squadron. Zsinj was made to appear foolish once again, but the attack caused the New Republic Provisional Council to make the difficult decision to commit forces to hunting Zsinj.

Isard's death and the fall of Coruscant caused many previously loyal Imperial officers and warships to flock to Zsinj's banner, including Admiral Apwar Trigit and his Imperial II-class Star Destroyer Implacable. Zsinj also picked up many parts of Isard's Imperial Intelligence network, and implemented new special projects. He absorbed the territory of many smaller warlords like Terrinald Screed, whom he executed. Controlling his forces from Rancor Base on Dathomir, Zsinj became increasingly ambitious.

But with Isard out of the way, the New Republic was able to commit a substantial force, under the command of Han Solo, to hunt Zsinj. Following his success in liberating Thyferra, Wedge Antilles and his unit was assigned to this force. Rogue Squadron was assigned to Mon Remonda, and Antilles formed a new X-wing unit, later known as Wraith Squadron, to counter Zsinj's tactics with their own innovative ideas.

Zsinj allowed his subordinates a degree of freedom in their fight against the New Republic. Admiral Trigit ordered Gara Petothel to plant false intelligence in New Republic databanks that allowed a small force under his command to destroy Talon Squadron in the Gravan system. Then, unlike Ysanne Isard, he retrieved his agent rather than killing her. This action, and the attitude behind it, met with Zsinj's approval. Zsinj and Trigit also implemented Project Morrt, which allowed Trigit to locate and nearly destroy the New Republic forces on Folor. Only a creative decoy tactic by the Wraiths ("the only flight of 'Dinner Squadron'") allowed the New Republic to escape the base. An empion mine, placed in the Xobome system as part of this project, could have destroyed Wraith Squadron. Unfortunately for Zsinj, they were able to use another creative tactic to foil Trigit. They captured the modified corvette Night Caller , killing Captain Zurel Darillian in the process, and began the process of collecting intelligence on Zsinj and destroying Trigit.

By impersonating Darillian, Garik "Face" Loran was able to fool both Trigit and Zsinj long enough to destroy Implacable in the Battle of Ession. The Wraiths discovered that the 181st Imperial Fighter Group under Soontir Fel was apparently serving Zsinj. They also collected a significant amounts of data about Zsinj's secret support network–much of which they attacked along the way. The fact that Zsinj was negotiating for the services of pirate forces gave the Wraiths a new avenue of opportunity in their fight against Zsinj.

Zsinj learned the identity of the squadron that had deceived him so effectively, and decided to target them specifically. An assassination attempt against the Wraiths on Coruscant itself gave the New Republic an idea of how deeply he had infiltrated their sphere of influence. Acting on recommendations from Wraith Squadron personnel, the New Republic Fleet allowed the squadron to set themselves up as a pirate band and harass the planet of Halmad for the purpose of attracting Zsinj's attention. The squadron was joined in this operation by Lara Notsil, who they believed to be an orphan from Aldivy. In fact, Notsil was really Gara Petothel, who initially joined the Wraiths for the purpose of aiding Zsinj and joining his faction.

Zsinj did take notice of the actions of the Hawk-bat Independent Space Force, and after bringing Iron Fist into direct conflict with them over Halmad, he invited the "Hawk-bats" to meet him aboard his flagship. Zsinj put on quite a show for the Hawk-bats, intending to mislead them about his personality and the discipline of those under his command while he gained intelligence about the pirates. Zsinj's interest was piqued by analysis of the Hawk-bats' combat communications, which had been filtered by comm system modifications performed on their TIE Interceptors by Castin Donn. The intercepted signals led Zsinj to believe that an Ewok was flying with the Hawk-bats. During dinner with Zsinj, "General Kargin" of the Hawk-bats (Garik Loran), spun a tale about his "most ferocious pilot," Kettch. This story vexed Zsinj, as it caused him to doubt the security of Project Chubar.

The meeting ended with Zsinj asking General Kargin to execute a captured infiltrator–Castin Donn. Donn had been captured while attempting to infiltrate restricted areas of Iron Fist–a mission which Commander Antilles had already disapproved. "Seku" (Dia Passik) agreed to execute the prisoner as a private commission for Zsinj. Being an expert in body language, Dia believed that Donn had already been killed and that Zsinj's people installed a pump in Donn's chest to simulate breathing as a test for the Hawk-bats, so she acted before any of her fellow pilots could do anything rash. After Donn's death, the Hawk-bats departed Iron Fist without incident, and Zsinj was left with little doubt about their veracity. Soon afterward, Zsinj demanded an inquiry into the Saffalore facility, and initiated experiments on a real Ewok, Kolot, to determine the plausibility of Kettch's existence.

At the same time, Myn Donos, the only surviving member of Talon Squadron, escorted Gara Petothel to a meeting in New Oldtown on Aldivy. Zsinj had received her request to join his forces, and dispatched one of his officers, Captain Rossik, to make contact with Petothel through the real Lara's brother, Tavin Notsil. Petothel, who had been having second thoughts about joining Zsinj, resisted Rossik's plan. Donos killed Tavin Notsil from his sniper position, and Petothel killed Rossik. Petothel and Donos returned to the Wraiths, and Zsinj was left confused about Petothel's intentions.

During the meeting with the Hawk-bats on Iron Fist, Zsinj provided the Wraiths with data on a large-scale attack on "an orbital refueling and trade station" for which he was contracting numerous private space forces. The information from Zsinj showed that the facility was defended by a large New Republic force, and implied that the facility orbited Coruscant, though the Wraiths were uncertain what could be in orbit over Coruscant that would merit the risk of a raid. However, the information about New Republic forces was a ruse on Zsinj's part, to guard against betrayal by his pirate allies. Analysis of the battle plan by Gara Petothel, the Wraiths' acting computer specialist, revealed the fact that the raid was not on a New Republic facility at all. The attack was against the space facilities of Kuat Drive Yards.

Zsinj had learned that KDY, still allied with the Empire, was very close to commissioning a new Executor-class Star Dreadnought, Razor's Kiss. The Empire was about to gain a ship that could challenge Zsinj's own flagship. Zsinj wanted Razor's Kiss for himself–wanted it almost desperately. He found the weaknesses in the construction facility's security by helping a Colonel in the ship's complement to set up a smuggling operation. The plan for capturing Razor's Kiss was twofold: A boarding party would seize the ship's bridge while Zsinj's space forces, including the pirates, provided a distraction for Kuat's defense fleet.

The plan worked almost flawlessly. Razor's Kiss left the Kuat system under Zsinj's command, and it looked as if he would win the day. Unfortunately for Zsinj, the Wraiths threw a few hydrospanners into the works. Shalla Nelprin uploaded a program into the computers on Razor's Kiss which would transmit the vessel's coordinates to the waiting New Republic fleet, then she stole a senior officer's hyperdrive-equipped TIE interceptor and landed on the hull of Razor's Kiss. At the same time, Voort saBinring crash-landed his interceptor on Iron Fist. General Melvar paid the pirates, and Iron Fist went to rendezvous with Razor's Kiss. Zsinj had no idea that his prize was about to be lost.

As soon as Razor's Kiss dropped out of hyperspace, she began broadcasting her location. Mon Remonda was waiting and Solo positioned his fleet to intercept. Zsinj was stunned, but he steeled himself for a fight and vowed "to rid the galaxy of the Rebels' most annoying cruiser... and of the legacy of Han Solo."

This was not to be, however, as the Wraiths' well-placed saboteurs made their moves. Shalla Nelprin destroyed the bridge deflector shields on Razor's Kiss, and the New Republic fleet pounded the undermanned and poorly-defended ship. Zsinj moved to protect his prize, and launched swarms of TIEs. Razor's Kiss lost her bridge, but Trooper Gatterweld, an Imperial loyalist, decided that it would be better for Zsinj to own the ship than to let it be destroyed. He tried to save the ship from the auxiliary bridge. It almost appeared as if Zsinj would once again turn defeat into victory, but then saBinring successfully reactivated his crashed fighter and attacked Iron Fist's own shield generators. The battle for Razor's Kiss was over.

As you see, the Rebels AND the Emire fought him. He is also in the Galactic Civil War.