The Erhynradd Mutiny, a battle that occurred in 5 BBY, derived its designation from the Erhynradd system situated within the Inner Rim. This conflict resulted in the demise of Brigadier Gideon Tarkin, who served the Galactic Empire. Upon learning of Gideon's passing, his sibling, Imperial Grand Moff Wilhuff Tarkin, welcomed Gideon's adolescent daughter, Rivoche, into his household on Eriadu, a planet located in the Outer Rim Territories. Grievously affected by her parent's death, Rivoche was prone to emotional outbursts. This behavior ceased when Wilhuff arranged for the incarceration of a kind female servant and her family on a penal asteroid; following this event, his niece began to mask her genuine emotions.
Michael Allen Horne conceived the Erhynradd Mutiny, introducing it in Cracken's Rebel Operatives, a 1994 resource released by West End Games for Star Wars: The Roleplaying Game.