Caprioril was a mostly tranquil world known for its podraces and swoop races, although podraces were officially banned in 23 BBY. Caprioril was the site of an infamous assassin droid tragedy, in which a droid slaughtered 20,000 Humanoids and aliens at a swoop arena in a massive explosion, including famous racer, Ignar Ominaz. The droid's goal was the assassination of Governor Amel Bakli. Famous swoop racers on Caprioril included Serji-X Arrogantus and Hodrix.
As of 22 BBY, Caprioril was governed by Shren Whist.
Mara Jade engages Lumiya on Caprioril.
Caprioril was named a sector capital by the New Republic.
Sometime between the Battle of Endor and 9 ABY, Mara Jade briefly worked under the name Marellis as a come-up flector for a Caprioril swoop gang. During this period, she encountered and dueled Lumiya, who was sent by Ysanne Isard on Caprioril to bring Jade back under Imperial service.
During the Emperor's reappearance in 10 ABY, the planet was besieged by the Empire. In the weeks following the siege, the New Republic released the textfile "Why Do We Fight the Empire?"
Around the time of the siege, New Republic historian Arhul Hextrophon survived an assassination attempt while visiting Caprioril, during which his leg was injured.
The PC game Star Wars: Rebellion mistakenly names the planet "Caprionril."