Battle of the Elom system

A battle occured in the Elom system during the Mandalorian Wars, in either 3,961 or 3,960 BBY. The Jedi Knight Revan and the Revanchists lead the Galactic Republic forces in a counter-offensive against the Mandalorian Neo-Crusaders. This brought them through the Stenos system, where they defeated the Mandalorians, to the Elom system, where they were also victorious. From Elom, they attacked Jaga's Cluster and were soundly defeated.

Behind the scenes
The battle is only referenced once in 2009's The Essential Atlas. It is marked on a galactic map showing the battles of the Mandalorian Wars rather than described in prose.