- "At first, the monsters provided quick and efficient executions for these outcasts. But eventually, the outlaws learned to tame the flying beasts."
- ―Arca Jeth
The rulers had hoped the dissidents, branded "criminals," would be devoured by the vicious beasts in the Onderon wilderness that had migrated over an oxygen bridge from the moon of Dxun. However, the rulers were proven wrong. Over time, the outcasts succeeded in taming the beasts, using them as winged war mounts for their campaigns against the walled city of the Iziz army. They managed to establish themselves as powerful Warlords, with great armies of vicious creatures at their command known as the Drexl. The Beast-Lord Kinch Sunka led the first attack on Iziz, the capital of Onderon, leading the planet into a permanent war.
The conflict between the corrupt monarchy and the Beast Riders escalated to the point that Queen Amanoa sought aid from the Republic. Jedi Master Arca Jeth's students, Ulic Qel-Droma, Cay Qel-Droma, and Tott Doneeta, were sent to deal with the situation. The Jedi learned that the queen's daughter, Princess Galia, had been kidnapped by the beast riders. Upon finding her, they learned the captivity was a ruse intended to hide Galia's true intentions: escape from the dark side-influenced royalty and marriage to the Beast-Lord, Oron Kira.
Queen Amanoa would not stand for any such marriage and attacked the Jedi with her dark side powers. Simultaneously, the Beast Riders attacked and took Iziz. Amanoa was defeated and Galia married Oron Kira. Their marriage ended the war between the city-dwellers and Beast Riders, finally granting a tenuous peace for Onderon.
The Beast Riders would fight once again—in defense of Onderon—during the Great Sith War against the allied forces of Exar Kun and the Mandalorians. They successfully drove the Mandalorians to Dxun, where Mandalore was killed by native wildlife. The Beast Riders also fought during the Mandalorian Wars, in which Onderon was one the first planets to fall to the Mandalorian warriors.
Many Beast Riders perished in the liberation of Onderon, and most survivors ended up in Iziz seeking employment as mercenaries. Many, however, became mere street thugs and criminals. Some of these included Bakkel and Panar, whom the Jedi Exile encountered while seeking holodiscs for Dhagon Ghent so she could meet with Jedi Master Kavar in the Iziz Royal Palace.
It is unknown which side the Beast Riders took in the Onderon Civil War, but it is assumed they were divided over the issue. Their beasts, on the other hand, aided the General Vaklu's Confederates and Sith allies due to the Sith practicing a ritual in Freedon Nadd's tomb to control the beasts. It is believed that they largely sided with the Royalist supporters of Queen Talia.
- Tales of the Jedi: Knights of the Old Republic (First appearance)
- Tales of the Jedi (audio)
- Tales of the Jedi: The Freedon Nadd Uprising
- Tales of the Jedi: Dark Lords of the Sith (audio)
- Tales of the Jedi: Dark Lords of the Sith 6: Jedi Assault
- Tales of the Jedi: The Sith War 6: Dark Lord
- Knights of the Old Republic 48: Demon, Part 2 (Appears in flashback(s))
- Star Wars: Knights of the Old Republic II: The Sith Lords
- Star Wars: The Old Republic (Mentioned in Codex entry)
- Bane of the Sith (Mentioned only)
- Darth Bane: Rule of Two
- Empire's End
- "Straight from the Horse's Mouth: A Guide to the Star Wars: Tales of the Jedi Universe, Part 1"—Star Wars Insider 26
- "Straight from the Horse's Mouth: A Guide to the Star Wars: Tales of the Jedi Universe, Part 2"—Star Wars Insider 27
- "Straight from the Horse's Mouth: A Guide to the Star Wars: Tales of the Jedi Universe, Part 3"—Star Wars Insider 28
- Star Wars Encyclopedia
- The Complete Star Wars Encyclopedia
- Galaxy at War
- "Authors of the Expanded Universe: Twenty Years of Tales of the Jedi"—Star Wars Insider 150
- Stay on Target