Darth Desolous conflict

"A thousand Jedi died cursing Darth Desolous."

- Darth Desolous

At some point after 3,522 BBY, a conflict was sparkled between the Jedi Order and the forces of the Pau'an Dark Lord of the Sith Darth Desolous. A Jedi Master expelled from the Order for studying Sith teachings, Darth Desolous swore revenge on the Jedi, assembled an army of Pau'an warriors, and trained them in his personal style of martial arts. His forces killed nearly two thousand Jedi, until Desolous and his army were defeated during a battle on the planet Yaga Minor.

Prelude
Some time after 3,522 BBY, a Pau'an Jedi Master was expelled from the Jedi Order for studying Sith teachings and falling to the dark side of the Force. Angered at this decision, the individual became the Dark Lord of the Sith Darth Desolous and swore revenge on the Jedi. He assembled an army of Pau'an warriors, and trained them in his personal style of martial arts. This style combined the usage of a melee weapon with a lightsaber-resistant cortosis shield; the shield was used to block an opponent's attack, leaving him open for a quick counterattack.

The conflict
"It took the entire Council to kill me, boy."

- Darth Desolous

Desolous led the Pau'ans in a series of ambushes against Jedi Knights throughout the galaxy, slaughtering almost two thousand Jedi. With each successful murder, Desolous grew more reckless and bold, and the Jedi Council decided to exploit those traits. A small force of Jedi was sent to the planet Yaga Minor, acting as a bait for the Sith Lord, while a large Jedi fleet remained hidden nearby. When Desolous and his army struck the Jedi on the planet, the fleet emerged from hyperspace and prevented the Sith Lord's forces from retreating. Caught into a tactically disadvantageous position, Desolous' men were all killed, and Desolous himself was struck down, allegedly by the combined powers of the Jedi Council members.

Legacy
"I am more powerful in death than I was in life!"

- Darth Desolous' simulacrum

As time passed, Darth Desolous' original name was forgotten, but his Sith name became synonymous with hatred and anger. A holographic simulacrum of Desolous was later incorporated into the Jedi Trials program for Jedi Padawans at the Coruscant Jedi Temple. This life-like manifestation could appear in the Trials chamber during the Trial of Skill, and was meant to test an apprentice's ability to overcome their raw emotions when forced to confront their deepest fears. This simulacrum of Desolous was aware of his physical death; furthermore, it took pride in the murders the real Desolous had committed

Behind the scenes
This conflict was mentioned in Darth Desolous' databank entry in the PlayStation 2, Wii, and PlayStation Portable versions of the 2008 video game Star Wars: The Force Unleashed, developed by Krome Studios.