Kentar was a Gul in the Cardassian military after the events of the Dominion War and was the orchestrator of the Kentar Uprising. Unsatisfied with the fate of the Cardassian Union, Kentar began a massive build up of military forces which struck the Federation during their incursion into the Delta Quadrant via a transwarp portal to combat the Borg Collective. This endeavour made Starfleet vulnerable and would have resulted in their fleet being decimated by the Cardassian fleet if not for the protection of the Klingon Empire. While the Federation was busy fighting the Borg, the Klingons began a war to stop the Union's war capability.