The Duel on Korriban took place in 4 ABY while the Death Star II was under attack. The duel was between Jedi Durja Lanew, Kau-Ja Manew and Eltva Matek and the Sith Lord Darth Octillious. For years the Jedi were trying to track him down. Eventually Bothan spies reported that he was hiding in the tombs of Korriban. The 3 Jedi immediately departed. Upon their arrival they started a search lasting 2 days. Finally they found Darth Octillious outside a tomb in the southern quadrant of the planet. They surrounded him and Durja Lanew spoke with the Sith for a brief time. After that they all drew their lightsabers.