General Whorm Loathsom
Y66 Division included Single Trooper Aerial Platforms, Persuader-class tank droids, OG-9 homing spider droids, and Octuptarra combat tri-droids in its arsenal. All units in the division were given enhanced self-aware programming in order to improve their efficiency in combat.
During the Battle of Christophsis, the division's B1 battle droids, B2 super battle droids, and tri-droids provided a second wave of attack against the Republic's forces, while tank droids were used as recon scouts. Tri-droids served as mobile heavy artillery, keeping the Republic's forces from advancing. One of the Sith led small squad of clone troopers in a flanking maneuver against Y66 Division, successfully destroying the tri-droids and leaving the troops led by the Sith and clone troopers to mop up the battle droids.