In 25 BBY, during the Separatist Crisis, Talus supported the Galactic Senate of the Republic and fought against an imminent invasion of his world by the fleet of Vanqor, a neighboring planet in the Uziel system.
As leader of the Typha-Dor High Council, Talus petitioned the Senate that it rush Jedi diplomats to his planet's aid and was intimately involved in the high-security and strategic planning meetings preparatory to Vanqor's imminent attempt to invade. He approved a preemptive countermeasure, based on secret intelligence, to trap the Vanqor fleet in a satellite-moon corridor through which the enemy made its approach.
Talus worked not only with High General Bycha and his lesser generals, but also with Obi-Wan Kenobi, Anakin Skywalker, Clee Rhara, Siri Tachi, and the other Jedi envoys sent at the behest of the Senate, to negotiate a ceasefire and an enduring peace between Typha-Dor and Vanqor's ruler, Van-Ith.
- Jedi Quest: The Moment of Truth (First appearance)