He and Delta Squad had the objective of eliminating the Geonosian lieutenant Sun Fac however, they had to split up for the drop and had to rendezvous close to their target. Like most clone troopers, Sev was first deployed during the Battle of Geonosis. Delta Squad performed live fire exercises along with the other commando batches. Vau, a Mandalorian, believed that in order for his commandos to survive in combat, he must train them as harshly as possible-to do anything less would compromise their training. Sev, part of Delta Squad, was trained on Kamino by Sergeant Walon Vau. Sev served under the Jedi Arligan Zey, Bardan Jusik and Etain Tur-Mukan. Sev completed many black operations for the Republic-covert missions typically involving activities that were highly secret due to questionable ethics and legality. Sev aided the Republic in a number of missions, fighting on planets such as Geonosis, Coruscant, Skuumaa, Mygeeto, Dorumaa, and finally Kashyyyk, where he went missing in action.

He was often referred to by his nickname of Sev, especially by his squad mates, and was well known for his morbid sense of humor.

Grand Army of the Republic during the Clone Wars.

RC-1207, also known as Delta-07 or Sev, was a clone commando and a sharpshooter in Delta Squad of the

Delta squad in the clone wars