Final Order

"The Resistance is finished. The Sith fire burns. All worlds surrender or die. The Final Order begins now."

- Darth Sidious

The Final Order, also known as the New Empire, was the galactic empire of the Sith that formed from both the Sith Eternal and First Order, it was ruled by Emperor and Dark Lord of the Sith Darth Sidious from the planet of Exegol in the galaxy's Unknown Regions. As part of their goal to establish a new Sith Empire and exact the Emperor's revenge, the Sith Eternal spent years building the massive Sith fleet, which consisted of Xyston-class Star Destroyers capable of destroying planets in a single sustained burst.

Emerging from the shadows
"At last the work of generations is complete. The great error is corrected. The day of victory is at hand. The day of revenge. The day of the Sith."

- Broadcast of Darth Sidious' voice to the galaxy

In 35 ABY, the Sith Eternal revealed themselves from the Unknown Regions on Exegol by broadcasting a message to the wider galaxy, which declared revenge from fallen Emperor and Dark Lord of the Sith Darth Sidious. Upon learning of this, Kylo Ren, Supreme Leader of the First Order, determined to destroy any potential threats to his rule, found the Force-imbued Sith wayfinder that contains co-ordinates to a location in the Unknown Regions and arrived at Exegol's Sith Citadel. Planet-side, Ren searches for the phantom Emperor who reveals himself, and divulged that he had created the former Supreme Leader Snoke, and that the Sith Lord has been every voice Ren has heard inside his head, including that of his grandfather, Darth Vader. The Dark Lord then offered command of the Sith fleet if he successfully eliminated Rey, the last Jedi. As the Emperor says this, many Star Destroyers belonging to the fleet raised up from the frozen sea and take to the sky.

A new Empire
"As I served you in the old wars, I serve you now."

- Enric Pryde, to Darth Sidious

After Kylo Ren abandoned the First Order and returned to the light side of the Force as Ben Solo, Allegiant General Enric Pryde became de facto leader of the First Order, and from his Resurgent-class Star Destroyer Steadfast, pledged himself to Darth Sidious once more, and gave the First Order over to the Sith as part of their final push for galactic conquest, the Sith Eternal then absorbed the First Order and renamed it Final Order as intended all along, and began to rise to dominate the galaxy in it place as a new restored Sith Empire.

Due to the escape of the Resistance operatives off Kijimi, a frigid mountainous planet located in the Bryx sector of the galaxy's Mid Rim, causing the Emperor to order Pryde to dispatch a Xyston-class Star Destroyer to obliterated the planet with its axial superlaser as a show of force. The weapon sent down a red beam to strike the surface, using red bolts of energy to hit the planet, causing massive shockwaves across Kijimi, eventually reaching the core of the world and leading to it being ripped apart.

Downfall
"I am all the Sith!''" "''And I am all the Jedi."

- Darth Sidious and Rey, during the Battle of Exegol

However, the Final Order was defeated at the Battle of Exegol by the Resistance and the Free Worlds Fleet, preventing the Final Order from ever truly taking form and bringing about the collapse of it brief rule over the galaxy.

Military
"Do not fear their feeble attack, my faithful. Nothing can stop the return of the Sith!"

- Darth Sidious, to his Sith devotees

The Sith fleet was composed of hundreds of Xyston-class Star Destroyers. which were based on the design of the older Imperial I-class Star Destroyers used by the Imperial Navy of the Galactic Empire. However, Xyston-class Star Destroyers were larger, had red accents along the hull of their vessels, and were equipped with a large axial superlaser capable of destroying planets, which took the place of a standard Imperial-class Star Destroyer's main hangar space. These Star Destroyers housed TIE/dg starfighters, with triangular wings and red accents, which were capable of ship-to-ship combat, and Sith troopers, including their variant Sith jet troopers, which were deployed on AAL-1971/9.1 Troop Transports and divided into traditional Sith legions, each of which were named after deceased Sith Lords, of 5,000 soldiers.

Appearances

 * Star Wars: Episode IX The Rise of Skywalker