The Battle of Korriban was the ending battle of the Sith/Remnant Crisis and where the high ranking Sith Lords were wiped out by the newly created Sith Empire led by Darth Tarna. The battle presented the highest act of betrayal within the Sith Order but according to Tarna, since they were not the Sith Order no longer it did not matter. No Sith with a rank higher that Sith Warrior or Sith Acolyte survived the invasion. This was the first battle in which the Sith Empire worked as a whole combining Sith and soldiers fighting together to destroy the Sith Order on Korriban.