Between the years of 3973 BBY and 3965 BBY, in the initial years of the Mandalorian Wars, the Mandalorian Neo-Crusaders launched an assault on the Quermia system, which was then under the control of the Galactic Republic. This attack occurred after a Mandalorian triumph in the Makem star system. After their success in the Quermia system, the Mandalorians proceeded to achieve a battle victory in the Kaelta system.
The Essential Atlas, published in 2009 and authored by Daniel Wallace together with Jason Fry, made reference to the battle that took place in the Quermia system. It was only indicated on the galaxy-wide map showing the Mandalorian Wars, rather than being detailed in written form.