Great Hyperspace War

The Great Hyperspace War was a war fought between the Old Republic and the Sith Empire in 5,000 BBY.

The Conspiracy of Sadow
On Korriban, the death of Dark Lord of the Sith Marka Ragnos created a power vacuum in the Sith Empire, resulting in a bloody war between factions. The two most prominent Sith, Naga Sadow and Ludo Kressh, battled to final domination of the Sith at Ragnos' gravesite on Korriban. Their duel was interrupted by the arrival of two explorers from the Republic, Gav and Jori Daragon, who were immediately taken prisoner, as the Sith wildly debated over what to do with them. Locked in the icy, underground prison in the Sith Fortress on Ziost, the Daragons soon learn from Simus that they are to be executed as soon as possible. However, in the first step of his elaborate plan to become Dark Lord, Naga Sadow and his loyal group of Massassi attack the Ziost prison, freeing Gav and Jori, and making it look like an attack orchestrated and carried out by the Republic. Gav and Jori are sent to Sadow's private fortress on Khar Shian, as Naga is successfully crowned Dark Lord of the Sith, in lieu of the "Republic attack."

The War Begins
Gav waits on Khar Shian for days, slowly being converted to Naga Sadow's cause, until the Dark Lord is ready to attack the Republic. When he is, he appoints Gav as commander of the Koros Major invasion, and Sadow's fleet flies off into the Republic. When they arrive at Koros Major, Gav flies down to the surface to look for his sister, flanked by a group of Massassi bodyguards. As he enters Aarrba's repair dock, the Massassi kill Aarrba, apparently seeing him as a threat. Jori enters at that very moment, and attacks Gav with a lightsaber, but Gav is able to escape and flee to Primus Goluud, where Naga Sadow's meditation sphere is.

Gav fires on the sphere, breaking Sadow's concentration, and giving the Republic soldiers the advantage in the Battle of Coruscant. Sadow lures Gav onto his meditation sphere to discuss this, and Gav foolishly does so. He quickly discovers that Sadow isn't there anymore. A fleet of Koros ships show up, along with Jori, who had followed Gav to Primus Goluud.

Gav transmits the coordinates to the Sith Empire to Empress Teta, telling her that the Empire is now completely defenseless with all of its military off invading the Republic. Naga Sadow's fleet appears, and fires what resembles lightning at Primus Goluud. Gav tells Teta and Jori to leave, which they and Sadow's fleet do, just before the red supergiant goes nova, destroying Naga Sadow's meditation sphere, and Gav along with it.

The Dark Lord Retreats
On Coruscant, the Jedi and Republic soldiers' resolve strengthens knowing their enemy is not as strong as it once appeared, and they are soon able to defeat the Sith armada. On Koros Major, the result is much the same. And on Kirrek, Master Ooroo kills many Massassi by shattering his own cyanogen tank, letting the fumes choke hundreds of enemies. However, because he is a Celegian, Ooroo is killed in the process as well, as the oxygen has the same effect on him that the cyanogen did on the Massassi. Regardless, that and the prisoner reinforcements from Ronika turn the tide in the Republic's favor, allowing them to win this battle as well.

Having lost in the battles of Coruscant, Koros Major and Kirrek, Sadow and his small fleet flees to the Sith Empire, where they are met by Ludo Kressh above Khar Delba; Kressh is killed after one of Sadow's ships crashes itself into Ludo's. Naga Sadow then took his remaining ships and hid on Yavin IV, where he would later teach Freedon Nadd in the ways of the Sith.

Meanwhile, Odan-Urr, who fought in the Battle of Kirrek, discovers a Sith Holocron on one of the abandoned ships on Koros Major. He takes it back to Ossus, where he will create the Great Jedi Library years later. And, for her leadership and bravery during this war (and infact, as a leader in general), Empress Teta would later have the Koros system and Koros Major named after her.

Battles

 * Battle of Khar Delba
 * Battle of Coruscant
 * Battle of Koros Major
 * Battle of Kirrek
 * Battle of Primus Goluud
 * First Battle of Korriban
 * Second Battle of Korriban