Sith'ari Empire

The Eclipse Sith Empire, also known as the Eclipse Sith Order, was a Sith Order created during the events of the Galactic Civil War. Originally made up of aristocrats under the Galactic Empire, this group came to believe that the rule of Emperor Palpatine was inefficient and at times contradicted their goals, causing them to form a hidden rebellion in the Emperor's Court itself. Locating the Sith holy world of Rhelg, they quietly underwent an exodus during the height of the Civil War and travelled there along with all of their families and a small amount of the loyal military. There, they crowned their leader Darth Amael, and he proceeded to build the then-Order into a proper Empire, including the creation of a breeding program in the hopes of the birth of a second Sith'ari. Jedi Extermination Squads were also established much later in the Empire's history to act as minor and subtle offenses against the New Jedi Order.

Having developed themselves into an impressive military and political power, the Eclipse Sith Empire officially emerged many years after the end of the Second Imperial Civil War and declared war on the Galactic Federation Triumvirate, leading to the events of the Sith-Triumvirate War. The birth and rapid ascension of Darth Mainyu, the promise second Sith-ari, allowed them to gain an early advantage of the war, and they very nearly destroyed the Triumvirate, their offensive campaign coming to its greatest height of success with the Siege of Coruscant. Ultimatley, however, they were forced off the planet and fought a defensive war. After repeling an assault on their homeworld, they engaged in back-and-forth battles until the Battle of Dantooine, where they officially surrendered following the death of Darth Mainyu and the annihilation of their navy.

With their leaders dead and the war lost, the Empire proceeded to almost completely dissolve.