Seswenna sector / Legends The Seswenna sector ( ) was a sector located in the Outer Rim Territories at the intersection of the Rimma Trade Route and the Hydian Way . It contained the planets of Eriadu , Seswenna itself , Adras , Agomar , Brintooin , Dzass IV , Eczar , Luptoom , Mirnic , Orryxia , Parwa , Hockaleg , Phelarion , Spuma , Uvena Prime , Uvena II , and Uvena III ; it also contained the Moshaw Dark Star . The Galactic Empire ' s " Tarkin " superweapon was built in the sector . History . The Sith Empire conquered the entire Seswenna sector during the Great Galactic War . The Sith Emperor ' s conquest of the Seswenna sector made Republic citizens and soldiers lose all hope in the Republic ' s survival until the Battle of Bothawui . Ranulph Tarkin and later Shayla Paige - Tarkin represented the sector in the Galactic Senate . During the time of the Galactic Empire , Seswenna sector was a part of Oversector Outer . The sector ' s capital was Eriadu City on Eriadu . The sector bordered Sluis sector . It was hinted that the sector only joined the Galactic Republic after Wilhuff Tarkin ' s birth ( 64 BBY ) . At any point , the sector was different from most other ones in the Republic , in that it was ruled by a governor and lieutenant governor appointed by the Galactic Senate , as opposed to a domestic government . The governor / lieutenant governor of the sector simultaneously served as the governor / lieutenant of Eriadu . During the last century of the Galactic Republic , Ulm Brashere represented the Seswenna sector in the Galactic Senate . Wilhuff Tarkin began his political career serving as the sector ' s lieutenant governor ; at some point after Palpatine became Supreme Chancellor , he was made first governor , then Moff of the sector , and later Grand Moff of Oversector Outer . After his death at the Battle of Yavin , Ardus Kaine became the successor of Wilhuff Tarkin as Grand Moff of Oversector Outer . The superweapon Tarkin was built in the sector in 3 ABY over the planet Hockaleg and was destroyed there in the same year by a Rebel commando team led by Luke Skywalker After the Battle of Endor in 4 ABY , Grand Moff Ardus Kaine transferred the capital of Oversector Outer from Eriadu to Entralla and founded his own empire in the New Territories . Soon after , Eriadu became the capital of the Eriadu Authority , an Imperial faction established by Superior General Sander Delvardus , and the Seswenna sector his core territory . In 5 ABY , Delvardus was defeated by the New Republic and fled to the Deep Core with his remaining forces . The sector eventually rejoined the loyal Imperial forces . During the Second Galactic Civil War , the sector aligned with the Confederation . Behind the scenes . " " incorrectly places Yaga Minor , Chandrila , Ghorman , Coruscant , Corsin , Balmorra , and Svivren in the Seswenna sector . Yaga Minor is near the Braxant sector ; Chandrila is in the Bormea sector ; Corsin is in the Ploo sector ; Ghorman is in the Sern sector ; Coruscant is in the Coruscant sector ; Balmorra is in the Colonies . Additionally , " Rebellion " incorrectly places the sector at the heart of the Galactic Core , and both it and " " mistakenly spell it as " Sesswenna Sector . " It is also mistakenly spelled " Seswanna " in " Pirates & Privateers " . The name of the sector was first pronounced in " " .