Battle of the Ambria system

This battle took place in the Ambria system 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 took the Mandalorian forces from their territory through the Vena system and to Ambria. Once the Mandalorians had taken this sytem, they took the Zel system, eventually moving on to the planet of Exodeen, staging their successful capture of Duro.

Behind the scenes
The Battle of Ambria 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.