Battle of the Dennogra system

A battle occured in the Dennogra 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 Taskeed system. From Taskeed, the Mandalorians attacked the Dennogra system and went on to raid the Dernatine 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.