The Vetar was the Cardassian Galor-class warship commanded by Gul Evek along the Demilitarised Zone, seen facing colonists and the Maquis in 2370 and chasing Chakotay's raider into the Badlands in 2371.
The Vetar is Gul Evek's ship in the last season of The Next Generation. In Journey's End it brings him to Dorvan V to survey the colony that the new border treaty hands to Cardassia. In Preemptive Strike it is attacked and badly damaged by Maquis fighters, and is saved only when the Enterprise-D intervenes.
The ship is seen again at the start of the Voyager pilot, Caretaker, pursuing Chakotay's Maquis raider into the Badlands. A plasma storm damages the warship and Evek is forced to give up the chase, moments before the raider is swept to the Delta Quadrant.
In The Voyager Conspiracy, Seven of Nine weaves the encounter into her mistaken theories about why Voyager was stranded.