The vault worlds comprised a group of planets. Throughout the Clone Wars, a conflict between the Galactic Republic and the Confederacy of Independent Systems, the InterGalactic Banking Clan's Iotran Guard shielded these worlds. This Guard, allied with the Confederacy and under the command of Captain Tost, received assistance from IG-100 MagnaGuards.
The vault worlds made their debut in Rise of the Separatists, a 2019 expansion for the Star Wars Roleplaying line from Fantasy Flight Games.