Battle of the Quellor system (Mandalorian Wars)

This battle took place on the planet of Quellor in 3,962 BBY as part of the Mandalorian Wars, a conflict between the Galactic Republic and Mandalorian Neo-Crusaders. The battle took place because the Mandalorians campaigned to take control of the Core World of Duro. Called "Mandalorian Triumph," this charge, which was ultimately successful, took the Mandalorian forces from their territory through the planet of Commenor and to Quellor. Once the Mandalorians had taken this world, they moved on to the planet of Exodeen and took Duro.

Behind the scenes
The Battle of Quellor is only referenced once in The Essential Atlas. The battle was marked on the galactic map showing the battles of the Mandalorian Wars rather than in prose.