Infinite Empire of the Sith (Cail's Empire)

"We are the true Sith. We will not cease until the galaxy is under our control and the Jedi vanquished forever. We have waited for centuries, and now we have elected to once and for all wipe the pathetic Federation and the collapsing Empire from the face of the galaxy. I am Darth Ominus, Emperor of the Sith, and the Force is my weapon."

- Darth Ominus's message to the Imperial and Federal leadership after his intervention in the Galactic Civil War, 10 ABY

The Infinite Empire of the Sith, also sometimes called the Infinite Empire (not to be confused with the pre-Republic Rakatan Infinite Empire) or the Sith Empire, was an interstellar galactic government active during the first millennium BBY and ABY. Founded in the Unknown Regions by the Dark Lord of the Sith sometime in the first millennium BBY, the Infinite Empire gradually expanded over the years, occupying new star systems and rapidly building up its economic and military capability. After the reigning Infinite Emperor took on the young Darth Ominus as his apprentice in the years leading up to the Clone Wars, the Empire underwent a period of expansion unseen in its history. This rate of expansion only increased after Darth Ominus murdered and overthrow his Master and made himself the Infinite Emperor. Amassing a huge wealth of power, he waited until after the Imperial Civil War was over, shortly after the climactic Battle of Coruscant, before attacking the known galaxy, to ensure that his prospective enemies would be at their weakest.