The Deathwatch, Enemies of the Mando'ade.
Mandalore, increasingly worried about the harassing of his shipments and people by the Deathwatch, sent his advisor, Horus Zakegg, to initiate a takeover of the Deathwatch. When Mandalore went to the Deathwatch Capital ship he sent Horus to, however, he learned that Horus had betrayed him and had been the leader of the Deathwatch after all. Soon after, they were ambushed, and Mandalore, a few soldiers, and Axscus Ordo struggled to fight them off. They were saved by the arrival of a certain N'etra. After Horus was destroyed, Mandalore assumed command of the Death Watch ship, taking it to the winter base of the Mandalorians, adding to his fleet. (BlueIce Twilight for those of you who weren't there.)