Aging Cardassian freighter commanded by Gul Dukat after his disgrace, refitted with Kira Nerys's help to strike back at the Klingons.
The Groumall was an aging Cardassian military freighter assigned to Gul Dukat after his fall from grace, when his acknowledgement of his half-Bajoran daughter Tora Ziyal cost him his position.
In Return to Grace, Dukat used the Groumall to carry Kira Nerys to a conference on Korma, and they found the outpost destroyed by the Klingons. Kira helped him fit the freighter with a heavy disruptor and trained his crew in resistance tactics, and with a ruse they captured a Klingon Bird-of-Prey, which Dukat kept to wage his own war on the Klingons.