Boss got a visual confirmation of Grievous', but then was attacked by two Magnaguards, with Grievous escaping and Tarfful killing the droids. After defeating the Trandoshans, Boss and the rest of Delta Squad freed several Wookiee prisoners before rescuing Tarfful. After rappelling down to the planet's surface from a LAAT/i gunship, the squad made their way through the jungle and found a camp of Trandoshan slavers. They finally succeeded.ДЄfter many other missions with Delta Squad, one of their last missions sent them to Kashkyyk to rescue the Wookiee chieftain Tarfful who had been taken prisoner by General Grievous. Reaching the hangar, they had to fight off an almost overwhelming droid forces while trying to get the Prosecutor's turbolaser battery array back online. Boss reunited with the members of Delta Squad, rescued Scorch and fought off many Trandoshan slavers, who had attacked the Prosecutor in the first place.

Boss began making his way through the ship, but soon heard a transmission from Scorch who got ambushed by droids. Again, the members of Delta Squad split up and entered the Prosecutor at four different locations. The Prosecutor recently appeared after being missing for two weeks and was finally found without power or communication capability. After arriving at the bridge, Delta Squad came under heavy fire from droids, but was able to complete their mission.Д«oss and the rest of Delta Squad were given a mission one day before the first anniversary of the Battle of Geonosis, which was to investigate the Prosecutor. Finally entering the ship, Delta Squad split up with each of the commandos sabotaging and destroying crucial systems in this ship. They had to make their way through a canyon, defeating many droid enemies, an advanced spider droid and disabling a ray shield that was blocking the entrance to the Core Ship.

Furthermore, the unit, were then informed that Omega Squad had failed in their attempt to destroy the Core Ship.Д«oss and the rest of Delta Squad were then tasked to infiltrate a Core Ship and to locate and capture vital launch codes on the ship's bridge. After tracking Sun Fac to a hangar where he was attempting to escape, Sev sniped and shot down Sun Fac's starfighter, which killed him. Boss then went and reunited with his other squad mates and then attacked Sun Fac in his command center. Each member of Delta Squad boarded a separate LAAT/i gunship with Boss being commanded to destroy an armored bunker. Boss and the Delta Squad would be given a mission to capture Poggle the Lesser's chief lieutenant, Sun Fac, on the planet of Geonosis. In 22 BBY, Delta Squad were deployed to Geonosis to fight in the Clone Wars' first battle. During a test of his melee skills, he broke his trainer's arm, and thus the trainer assigned him to the Delta Squad and gave him the title of sergeant, but his squad mates called him Boss. Boss trained on Kamino, but the difference with him was his high scores in weapons and tactics training.

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