The Second Battle of Brentaal occurred in 10 ABY.
This battle took part of the offensive planned by reborn Emperor Palpatine against the New Republic to reconquer the Core Worlds. Those assaults were executed by the reunified Imperial warlords and loyal Imperial forces prior to the launch of Operation Shadow Hand.
Grand Moff Ardus Kaine was charged to reconquer the Northern Dependencies, including the northern part of the Core. This battle allowed the Empire to control Brentaal IV and penetrate in the Core Worlds, already conquered by Superior General Sander Delvardus.