Second battle of the Seswenna sector In 3680 BBY , during the second year of the Great Galactic War , a battle occurred between the Sith Empire and Galactic Republic in the Seswenna sector of the Outer Rim Territories . This was the second battle in the Seswenna sector that the conflict had seen , and like the first , it was waged with the goal of breaking the Imperial blockade of the Rimma Trade Route — a super - hyperroute that ran through the region and supplied resources to the southern reaches of the Outer Rim . Unlike the first battle of the Seswenna sector , this effort proved to be successful , and the Republic Navy was able to regroup after their earlier defeat to overcome the forces of the Imperial Armada . The Sith were forced off of the Rimma Trade Route , which opened the hyperspace lane to usage by the Republic Military to resupply their fighting forces on Outer Rim fronts , like the contested Minos Cluster . Prelude . Early in the Great Galactic War , the Sith Empire launched a broad but strategic blitz against Galactic Republic interests and holdings in the Outer Rim Territories of the galaxy . After seizing the Tingel Arm and striking against tactically important worlds such as Korriban and Sluis Van , the Imperial Military launched a massive invasion of the resource - rich Minos Cluster . The offensive was initially very successful , in part because the Imperial Navy had positioned itself in the Seswenna sector along the Rimma Trade Route , effectively blockading the super hyperspace lane . The Imperial vessels held the Seswenna sector throughout 3681 BBY , successfully strangling Republic supply lines meant to carry reinforcements and materiel to Jedi defenders on the front lines of the Minos Cluster Campaign . In 3680 BBY , a year into the war and blockade , the Republic Army mounted an effort to break the Sith control of the Seswenna sector . The counterattack was thoroughly unsuccessful and saw hundreds of Republic soldier s taken as prisoners of war by the Imperial victors . News of the defeat troubled the Jedi in the Minos Cluster and further lowered Republic morale . However , Republic Military leaders remained committed to breaking the Imperial fleet in the Seswenna sector to free up the vital Rimma Trade Route . The battle . Shortly after the first attempt to break the blockade , the Republic ' s naval fleet , which had been scattered during the retreat from the Tingel Arm campaign , regrouped for a new assault against the Imperial Armada in the Seswenna sector . The gathered forces of the fleet moved against the blockade and successfully broke the Empire ' s hold on the Rimma Trade Route , winning the battle and securing the supply line . Aftermath . News of the success was quickly spread to other battlefronts in the Outer Rim , raising morale and encouraging Jedi defenders to continue their fight . In the Minos Cluster , Jedi Knight Gnost - Dural , who was fighting on the front lines of the Battle of Eliad , was relieved to know that the end of the blockade meant the imminent arrival of reinforcements and supplies . As the war continued to drag on in later years , the Republic ' s ability to move forces along the Rimma Trade Route allowed for its armed forces and Jedi warriors to regain a foothold in the Minos Cluster , which was maintained until the end of the conflict in 3653 BBY . Mention of the battle was included in the wartime journal of Gnost - Dural , which was committed to the Jedi Archives on Tython during the Cold War . Behind the scenes . The second battle of the Seswenna sector was first referenced in " The Journal of Master Gnost - Dural " , a 2011 book written by Robert Chestney under the in - universe persona of Jedi Master Gnost - Dural . The book was included as part of the " " collector ' s edition game bundle and served as a source of background lore to the massively - multiplayer online video game .