Dyarchy The Dyarchy was a small Sith principality that was located on the planet Byllura in the Grumani sector during the Republic Dark Age . It was led by the adolescent Sith Lord siblings Dromika and Quillan , with the Krevaaki Sith Lord Saaj Calician serving as its Regent . The Dyarchy started building its fleet in 1037 BBY as part of a planned expansionary campaign against the neighboring Daimanate . In 1032 BBY , the Jedi Knight Kerra Holt and the mercenary leader Brigadier Jarrow Rusher visited the planet following the Battle of Gazzari . Their actions brought about the collapse of the Dyarchy after Kerra kidnapped Quillan , which disrupted the worldwide mind - control ethernet the twins had used to enslave the planet ' s population . Their older sister and fellow Sith warlord then Arkadia Calimondra annexed the Dyarchy to her own domain . Politics and society . The Dyarchy ' s constituent territories consisted of the planet Byllura , a former Republic world that had been conquered by the Chagras Hegemony during the First " Charge Matrica " , a competition instituted by the Calimondra family matriarch Vilia Calimondra . Its capital city was Hestobyll , which was built as a river delta carved into a steep , diagonal slope at the interior of a large continent . While Chagras ' s youngest children Quillan and his sister Dromika were the nominal rulers of the Dyarchy , much of the Dyarchy ' s affairs were managed by their Krevaaki Regent and Sith Lord Saaj Calician . Calician used the twins ' powerful Force abilities to create a global telepathic transmission network that allowed the three Sith to directly control the daily functions and actions of their subjects . By 1032 BBY , Byllura ' s inhabitants had been reduced to the status of mindless drones whose sole existence was to serve their Sith overlords . Any visitors who visited the Dyarchy became ensnared and forcibly integrated into this telepathic network . This meant that very little reliable information about the Dyarchy escaped Byllura . The Dyarchy ' s telepathic transmission network was transmitted by a network consisting of thousands of enslaved Celegian s . These Celegians helped transmit messages and commands from the twins and Calician to the Dyarchhy ' s subjects . A force of red - clad Sith adepts known as the Unifier s functioned as the Dyarchy ' s primary law enforcement agency and were tasked with using Force persuasion to dull the minds of the Dyarchy ' s inhabitants and to send messages through the web . Under Calician ' s leadership , the Dyarchy also developed a significant military - industrial base for the purpose of launching a military expansion campaign against the Dyarchy ' s neighbors in the future . By 1037 BBY , the Dyarchy had also secretly constructed a fleet of fourteen battleships known as the Dyarchy Fleet beneath Hestobyll ' s reflecting pools . Each of these battleships was commanded by a single Celegian who answered directly to the Dyarchy ' s telepathic web . Due to its highly centralized nature , the Dyarchy ' s telepathic network was vulnerable to any direct attack on its core leadership . Following the capture of Quillan and the incapacitation of his sister Dromika , the network collapsed entirely which led to a mass uprising by its subjects . Due to the collapse of much of the Grumani sector ' s hyperspace relay s caused by the decline of the Republic , the Dyarchy had no reliable communication networks with offworld locations and remained isolated from its Sith neighbors and the Republic . The Dyarchy even lacked infrastructure for comlinks because Calician believed that a secondary communications system would provide a means for internal dissidents to coordinate resistance to the state . The Dyarchy ' s nearest neighbor was the Sith princedom known as the Daimanate , which was ruled by the late Sith Lord Xelian ' s younger son Daiman , who viewed himself as the Creator of the universe . Despite correspondences between Regent Calician and Daiman in 1037 BBY via hologram , the latter was unwilling to ally or engage in hostilities against the Dyarchy . Another known neighbor of the Dyarchy was another Sith state known as the Arkadianate , which was ruled by the twins ' older sister Arkadia Calimondra . The Arkadianate was militarily stronger than the Dyarchy and posed a threat to the Dyarchy ' s existence by 1032 BBY . Unlike the Bactranate — another Sith state ruled by the Quermian Sith Lord Ayanos Bactra , the Dyarchy had no corporate assets . History . Origins . The Dyarchy was formed following the death of the Sith warlord Chagras in 1040 BBY . Chagras was the sole surviving son of the Sith Lord and Calimondra family matriarch Vilia Calimondra and the sole winner of the " Charge Matrica . " Vilia had devised the " Charge Matrica " as a competition to select the most worthy heir to inherit her extensive holdings . She promised to grant her extensive assets and territories to the child who conquered the most territory . Chagras ultimately won this contest and became the ruler of a new Sith state known as the Chagras Hegemony . However , Vilia still lived and controlled much of her empire . His victory brought a brief period of stability to the Grumani sector and guaranteed Chagras the assistance of his nieces and nephews , so he tasked them with repairing the damage that the war had caused his holdings . Around 1046 BBY , Chagras fathered two twins : a girl named Dromika and a boy named Quillan . When the twins turned five years old circa 1041 BBY , Chagras brought his children to live on Byllura under the care of Regent Saaj Calician . While the twins remained in an infantile state for much of their lives , Calician found that both of them had extraordinary Force abilities in certain areas that exceeded the powers of many other Sith . Quillan had a greater ability to predict the future than any other Sith that Calician had met , while Dromika was more proficient with the use of the Force to control the minds than anyone else he knew . Calician and the twins resided at The Loft , an exclusive private residence in Hestobyll , and never left its premises . They perceived the wider universe entirely through the Force and referred to all other sentient beings as " aspects . " The twins regarded Calician himself to be their " regent - aspect , " and he served as their main link to the outside world . He tended to their every need and he acquired some nanny droids , to care for twins when he wasn ' t present . Calician ' s Experiment . In 1040 BBY , Chagras died after being infected with a powerful nerve toxin . The Chagras Hegemony quickly disintegrated as rival Sith warlords fought each other and several new princedoms were formed . Without a heir to inherit her vast holdings , Vilia initiated a Second " Charge Matrica " among her grandchildren to select a new successor . Regent Calician took advantage of the crisis to establish the Dyarchy as a separate state and served as the mastermind behind the Sith twins . Putting his theories of a centralized Sith state into action , Calician established a global telepathic transmission network on Byllura . To do this , he lured and enslaved thousands of Celegian s , a species of sentient invertebrate s that resembled floating brains , and used their telepathic abilities to form a telepathic web . The result of Calician ' s experiment in thought control was the enthrallment of Byllura ' s people into mindless drones whose sole existence was to carry out the edicts of their Sith rulers . Calician also created a de facto police force of Sith adepts known as the Unifier s to enforce compliance among the Dyarchy ' s subjects . The result of Callician ' s telepathic network was a highly centralized Sith state whose rulers directly imposed their will on their subjects . All visitors who visited Byllura were integrated into the Dyarchy ' s telepathic network which meant that there was little reliable information on the Dyarchy within the wider galaxy . By 1032 BBY , the mercenary leader Brigadier Jarrow Rusher had heard unconfirmed rumors that Byllura was under a Sith principality ruled by children and that it was managed from " behind the creche " by a regent . The Dyarchy ' s offworld contact was also limited by Byllura ' s remote location at the edge of the Grumani sector where there were few reliable hyperspace routes . Over the next few years , the Dyarchy ' s population , manufacturing facilities and military capabilities expanded under Calician ' s guidance . However , as the twins matured , Quillan increasingly began to use his sister ' s Dromika ' s mental capabilities to take direct control of the Regent ' s mind . Sometimes , Calician found himself subsumed into the communications web that he had created , becoming an unthinking extension of the twins ' will . In 1037 BBY , Calician also initiated construction of the Dyarchy Fleet , a force of battleships that was secretly constructed beneath Hestobyll ' s reflecting pools . Around this time , Calician also made contact with Daiman , the twins ' cousin and the leader of the neighboring Daimanate Sith state , via hologram . While Calician had hoped to forge an alliance with Daiman , the self - proclaimed " Creator of the Universe " was unwilling to either ally with or engage in hostilities against the Dyarchy . By 1032 BBY , fourteen battleships in the Dyarchy Fleet were completed and Calician turned his attention to expanding the Dyarchy ' s territories , determined to export his own conception of the perfect " Sith state . " The Jedi " Knight Errant " . In 1032 BBY , a new threat to the Dyarchy came in the form of the lone Jedi Knight Kerra Holt . She was a Jedi operating " knight errant " missions in the Sith - dominated Grumani sector . Following the Battle of Gazzari , Kerra had escaped the planet on the mercenary leader Brigadier Jarrow Rusher ' s troopship " Diligence " with nearly 1 , 700 student passengers . Unable to travel to the Galactic Republic due to a lack of reliable hyperspace routes , Rusher took the " Diligence " to Byllura , the nearest known terrestrial planet in the sector . Since the students were placing a strain on the ship ' s space and resources , Rusher wanted to dump the refugees on the nearest habitable planet . Kerra and Rusher were unaware about the Dyarchy ' s existence and its Sith rulers . The " Diligence " landed at the spaceport in Hestobyll . Concerned about the suitability of Dyarchy as a refuge for the students , Kerra convinced Rusher to allow her to do a one hour probe of the city . Kerra quickly discovered that the planet ' s inhabitants were mentally enthralled to a global telepathic network and found that the Celegians were serving as the transmitters within this network . For the Dyarchy ' s Regent , the arrival of the " Diligence " marked the first starship that had visited Byllura in years . Since the ship had previously originated from the Daimanate , Calician thought that Daiman ' s control over his domain had weakened . He ordered the Dyarchy Fleet to begin preparations for an invasion of the Daimanate ' s rearward systems . He also dispatched a party of Unifiers to impound the " Diligence " and " integrate " its crew . However , Rusher fought off the Unifiers and the " Diligence " managed to escape from its hangar bay after a skirmish . Meanwhile , one of Kerra ' s charges the Sullustan student Tan Tengo left the ship to explore Hestobyll without Rusher ' s permission and the Brigadier sent one of his Troopers — the Duros recruit Beadle Lubboon to bring back the girl . Another party of Unifiers apprehended the pair and Kerra pursued them back to the Loft . After fighting her way through the palace , she encountered one of Calician ' s Celegians named " One " and convinced him to rebel against his Sith overlords by refusing to transmit any more commands across the telepathic network . " One " subsequently convinced his fellow Celegians to rebel and the Dyarchy ' s network broke down within hours . After dueling Calician and the twins in a heated skirmish , Kerra kidnapped Quillan . Her actions effectively decapitated the Dyarchy ' s command chain which further accelerated the collapse of the telepathic network . Disintegration . The kidnapping of Quillan caused the breakdown of the Dyarchy ' s society and Byllura ' s inhabitants quickly regained control of their thoughts , actions , and behaviors after years of suppression . Riots quickly broke out in Byllura ' s population centers as the citizenry rebelled against the planet ' s Sith rulers . Meanwhile , Rusher rescued Tan , Beadle , and Kerra from the Loft , and took Quillan as a hostage . The Sith Lord quickly descended into an infantile tantrum while his sister Dromika fell into a coma . Free of the twins ' control , Calician contacted Kerra and tried to convince her to kill Quillan in revenge for the mental enthrallment he had endured . Meanwhile , the Sith Lord Arkadia Calimondra invaded Byllura and her star fleet quickly wiped out the Dyarchy Fleet within minutes . She also trapped the " Diligence " in her warships ' tractor beam projector and convinced Rusher and Kerra to follow her to Syned and offered to shelter the refugees . With the Dyarchy ' s command structure destroyed , Arkadia ' s forces occupied Byllura with little resistance from the planet ' s population . The Bothan spy and independent operative Narsk Ka ' hane was also present when Arkadia ' s soldiers executed Narsk , who accepted his end peacefully . Arkadia had ordered the execution of the Regent because she regarded him as the mastermind who had exploited her young siblings and a threat to her own ambitions . Arkadia promoted her Sith regime as a more enlightened regime and offered to integrate the Byllurans as Arkadianate citizens . Arkadinate forces also freed the Byllurans from their enslavement and took custody of both Quillan and Dromika . During a subsequent family Bequest , the family matriarch Vilia Calimondra formally recognized Arkadia ' s annexation of the Dyarchy . Feigning to care for her brother , Arkadia also offered to send Quillan to Arkadia ' s secret retreat world which Vilia agreed . However , she planned to assassinate her grandmother and take advantage of the ensuing crisis to further her own territorial ambitions . She had prepared several warring parties for strikes on neighboring Sith states in the event her grandmother was killed . She also intended to kill Quillan by exposing him to the nerve toxin Chagras ' s Blood . Arkadia attempted to recruit Kerra but the Jedi Knight refused and the Sith Lord was forced to rely on the Bothan spy Narsk . However , Narsk was secretly working for Vilia and she ordered him to sabotage Arkadia ' s plans . He convinced Rusher and Kerra to stage a diversionary attack on Arkadia ' s capital of Calimondretta . Narsk then took advantage of the chaos to escape with Quillan to Vilia ' s secret retreat . The devastation on Calimondretta forced Arkadia to withdraw significant forces from Byllura and to suspend her plans of galactic domination . Behind the scenes . The Dyarchy first appeared as a plot element in the second section of his stand - alone novel , " Knight Errant " , which was first released on January 22 , 2011 . Much of the information of that government from the novel is recorded from the point of view of Saaj Calician , one of the antagonists and the fourth major POV character .