Battle of Mohon

During the Dark Galactic War, the Jedi Grand Master known as Jel Wilkins made a suprise attack on the secret planet of Mohon, where he learned the Lord Emperor secretly hidden his body below the depths of the Emperor's Sanctuary. While the other Jedi battled with the Sith fleet with the Republic war fleet as a distraction, long enough for Wilkins to infiltrate the Sanctuary on the planet below.