Eternal Empire conquest

Around 3640 BBY, the emerging Eternal Empire launched a campaign of conquest into the Core Worlds, defeating both Galactic Republic and Sith Empire, the known galaxy's major powers. Some Eternal Empire's

Prelude
During most of the Sith Emperor's absense from reigning his Sith Empire, he had been secretely developing a new empire, the Eternal Empire, positioned in uncharted territory within Wild Space and with capital on the planetZakuul. There, known as Emperor Valkorion, he built and strengthened his forces for one day to emerge and conquer the galaxy. By 3640 BBY, the Sith Empire's few outposts in the Wild regions had been wiped out by the Eternal Empire to test the latter's strength although the Sith Empire was unable to discover the culprits. Soon that year, as the Galactic War raged between Sith Empire, Republic and third parties, the Eternal Empire launched raids and decimated several of their planets, including Korriban, before retreating back into Wild Space.