In the year 2410, Bellas was injured during an assault against the Turei by the Vaadwaur Supremacy. After he was revived by an away team from an Alpha Quadrant Alliance starship, Bellas and the away team worked together to restore the planetary defense grid, which had been disabled by the Vaadwaur. Bellas worked from the central tower and later called the away team to help when Vaadwaur soldiers attacked his barricade. The Turei soldiers, AQA away team and Voth troops joined forces to repel the attacking Vaadwaur.
Bellas was well aware that it had been the Federation starship USS Voyager that had unleashed the Vaadwaur upon the quadrant but was grateful for the help the AQA and the Voth provided in saving the planet from disaster. (STO - "The Delta Quadrant" mission: "Revelations")
In March 2410, Bellas was in command of the Turei fleet taking part in the Delta Alliance invasion of Vaadwaur Prime. The Turei captured the nearby subspace corridors to keep the Vaadwaur from accessing them. When the Alpha Quadrant Alliance, accompanied by the flagships of the other Delta Alliance partners, led the final assault on the Vaadwaur ships in the planet's orbit, Bellas arrived with his fleet to assist the allies. Commander Eldex and his fellow revolutionaries played the role of the cavalry as well. United, the Allies obliterated Gaul's fleet, including his flagship, the VSW Vozroz. (STO - "The Delta Quadrant" mission: "Takedown")