around 300 years later, the original sith empire, now under the leadership of emperor vitiate, emerged from the unknown regions and declared war on the republic. this war, dubbed the great galactic war, was halted when vitiate, on the cusp of victory, was restrained by the telepathic prowess of revan. after a period of non fighting, called the galactic cold war, tensions boiled over, and the galactic war began. the sith empire eventually fell to infighting, and mostly disappeared. occasionally, a dark lord such as darth rivan or darth ruin, would rise and fall, but the sith did not become a major threat again until around 2,500 years later.