The Ancient Empire

The Ancient Empire (also known as the Eternal Sith Empire 2000 years ago) is a long lost empire that was led by the legendary Dark Lord of the Sith Darth Bane. It's original founder was Ceia Ethesus, who was one of the most strongest Sith Lords that time, until Darth Bane killed the leader to rule the empire.

Prior to Darth Bane's death, The Eternal Sith Empire, better said, the Sith were at their peaks, almost annihilating the Jedi and the Old Republic.

After Darth Bane's death, the Galactic Republic wrongfully thought the Sith was exterminated, and the Eternal Sith Empire remained unknown until 82 BBY, a Dark Lord of the Sith raised from the ashes and became known as Darth Atheus, ruler of the Ancient Empire.

It will debut on the seventh episode of the first season of the series.

Creation
Ceia Ethesus theorized the Eternal Sith Empire to show the "Power of Sith Eternal." to the old republic and her arch-nemesis Darth Bane. Bane already had his own empire but fell afterwards. He then saw the Eternal Sith Empire as his own target, manipulating Ceia into thinking working together would do wonders. Ceia, being his arch-nemesis, did not agree at first but then gave it a shot. They worked together for 5 years, until Bane killed Ceia and took over the Empire by himself, eventually near-exterminating the Old Republic and the Jedi.

The Eternal Sith Empire spent their times training all the Sith and getting them ready for "one last war against the Jedi.".

History
On 1036 BBY, they were in war against the Old Republic for the first time, with Bane in control, the Eternal Sith Empire were winning for most of the 46-year long war. That is, until Bane was defeated by Valenthyne Farfalla on 990 BBY. The Old Republic was also at war with the New Sith for millenia. The Old Republic was winning and eventually "destroyed" the Sith.

Somewhere around 600 to 500 BBY, a Dark Lord of the Sith, who claimed to be stronger than Darth Bane, emerged from the shadows and attempted to rebuild the Eternal Sith Empire, this frightened the Galactic Republic and the Jedi Order, and immediately fought the Sith, defeating him.

On 86 BBY, another Dark Lord of the Sith, who claimed to be stronger than Bane, contacted Plagueis, who was the strongest Sith Lord at that time. Atheus had asked for help to rebuild the Eternal Sith Empire. Plagueis had asked Atheus to change the name to prevent mass panic. And so, the Eternal Sith Empire changed to the Ancient Empire.

On 82 BBY, it was officialy reorganized as the Ancient Empire, and rose from the shadows. They had invaded Korriban, Ord Mantell, and everything of the Unknown Regions, including Teneteus, being their home planet.

On 51 BBY, The Ancient Empire invaded Erastelle and Tatooine, to show superiority to the Jedi Order, but the Jedi Order didn't consider it a threat, as they invaded the planets with the poorest infastructures.

On 32 BBY, during the invasion of Naboo, The Ancient Empire secretly aided the Trade Federation to finally put an end on the Jedi Order and the Royal House of Naboo, but failed ultimately.

On 22 BBY, during the battle of Geonosis, and during the Clone Wars, the Ancient Empire secretly aided the Confederacy of Independent Systems to finally put an end to the Galactic Republic, and succeeded, by executing the last remaining Jedis during the Order 66 execution.

On 14 BBY, they joined The Grand Government of the Coruscant System in hopes of secretly slaughtering all the remaining Dark Jedi and Sith betrayers.

Possible future
In the near future, if its possible, Darth Atheus is planning on merging with the Galactic Empire and ultimately, rule the galaxy where there is no Jedi and no rebellion.

The unofficial names given to this possible merged empire are:
 * The True Sith Empire
 * The New Sith Empire
 * The Galactic Sith Empire