- "But why expect better from the Republic? That fool Captain Morvis is exactly who they are—no judgment, all ambition! At least Mandalorians believe in something, Zayne. Yes, they can be indiscriminate and brutal, but with our guidance. They can change. The Republic can't. We're on the wrong side!"
- ―Dorjander Kace to Zayne Carrick
During the Mandalorian Wars, a clandestine group of Jedi Masters were among the growing legions who defied the orders of the Jedi High Council and went to battle the Mandalorians under the command of Revan. Unlike the Revanchists, however, these rogue masters began covertly sabotaging the Republic war effort under the direction of the maverick ex-council member Dorjander Kace. Having come to believe that the Republic was corrupt beyond redemption, Kace and his followers embraced the Mandalorian way of life, coming to call themselves the Mandalorian Knights.
After his removal from the Jedi High Council, Dorjander Kace came to the conclusion that the Galactic Republic was irreparably corrupt and that the Mandalorians were far better suited for galactic dominion. Gathering a group of like-minded Jedi Knights and Masters, Kace became a double agent in the Mandalorian Wars for a brief period before his intentions were revealed by the Jedi Padawan Zayne Carrick. Kace and his newly-christened Mandalorian Knights served Mandalore's banner as the Mandalorians' counterpart to the Jedi Order in the war. During his long-awaited infiltration of the Jedi Enclave on Dantooine in 3962 BBY, Kace and his accomplices surrendered and were returned to the Core Worlds for trial; the Knights were likely disbanded after this point.
- Star Wars: Knights of the Old Republic: War (First appearance)