Sometime between 19 BBY and 10 BBY, the Galactic Empire took control of the planet Petrusia. At the Imperial outpost on Kullgroon, they forced into servitude a number of the native Petrusian species. Not long after this happened, Lando Calrissian, a smuggler, traded weapons with Kristiss, a Petrusian resistance fighter, and easily bypassed the Empire's defenses. In 10 BBY, Kristiss recounted her meeting with Calrissian to another member of her resistance group, mentioning the occupation of Petrusia, and suggesting that he might be able to smuggle the enslaved Petrusians away from Kullgroon. Soon after, Calrissian infiltrated the Imperial outpost, where he encountered Rythus, Kristiss' father. As Rythus and Kristiss argued regarding the smuggler's involvement in their liberation, Kristiss apologized for her father's behavior, stating that he was unaccustomed to Calrissian's personality. Calrissian commented that Rythus seemed to prefer the kind of personality that allowed his planet to be conquered.
The comic-book series Star Wars: Lando - Double or Nothing mentioned the Empire's takeover of Petrusia in its first issue. Marvel Comics published the issue on May 30, 2018, and it was written by Rodney Barnes and illustrated by Paolo Villanelli.