In 4000 BBY, the Protectors were employed by Queen Amanoa of Iziz to protect both she and her daughter from the Beast Riders, who had staged an assault on the Royal Palace of Iziz. They attempted to carry out their mission, but were defeated by the Beast Warrior Commandos who subsequently abducted Amanoa's daughter, Princess Galia.
The Royal Protectors were again active after the Battle of Iziz, when Amanoa had perished. This time they were enlisted by her husband King Ommin, as guardians for his secret underground stronghold under the Palace of Iziz. These guards were too defeated by Jedi, when they stormed Ommin's lair to rescue the captured Jedi Master Arca Jeth.