Battle of the Stenos system

A battle occured in the Stenos 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 Vorzyd system, where they defeated the Mandalorians, to the Stenos system, where they were also victorious. From Elom, they attacked the Elom system.

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.