Journeyman Protectors were lawmen from the Mandalorian world of Concord Dawn. CC-1138 was one of the few clone troopers who trained with an ex-Journeyman Protector, which for some explained his reputation as a loner.
- Star Wars Character Encyclopedia: Updated and Expanded (First identified as Journeyman Protector)
- Star Wars: Absolutely Everything You Need to Know, Updated and Expanded
- Ultimate Star Wars, New Edition