Battle of the Sy Myrth system

A battle occured in the Sy Myrth system during the Mandalorian Wars. In 3,963 BBY, the Mandalorians began their full invasion of Galactic Republic territory. One of the prongs of their asssault sent them through the Jaminere system. From Jaminere, the Mandalorians attacked the Sy Myrth system and went on to raid the Taskeed 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.