Twelve was born on Kamino in the year 32 BBY. Twelve was given command training and he graduated as a major, becoming one of the few. He would be placed in charge of the Hawkbat Battalion, which fell under the corps of the 327th Star Corps.
The major was sent to the First Battle of Geonosis with the Hawkbat Battlion, where many of them perished. Part of the battalion, K Company, under the leadership of Captain Deviss, was sent to fight against Spider droids on Geonosis, leaving a majority of them deceased. Deviss and two other critically injured troopers survived. Twelve was able to survive the battle, maintaining the leadership of Twelve, Tyto, Deviss, Barr, and Green.
- Guide to the Grand Army of the Republic - Star Wars Insider 84
- The Complete Star Wars Encyclopedia, Vol. II ("Hawkbat Battalion")
- Star Wars: Clone Wars – "Chapter 1" (possible appearance)