Star Trek: 12 Biggest Losses Starfleet Ever Faced
11. The Loss Of Deep Space Nine
At the close of the fifth season of Star Trek Deep Space Nine, things have come to a head between the Federation and the Cardassian-Dominion alliance. With plenty of posturing and the eventual mining of the entrance to the Wormhole, the board is set for all out war - something Star Trek had not yet shown.
The first battle of the war does not go well for the Federation. No reinforcements are available to help defend the station, leaving the crew with only the Defiant and the Rotarran as support vessels. A fleet of Dominion ships surrounds the station and quickly overwhelms the station's defenses, leaving Captain Sisko with only one choice: abandon the station.
Before the Federation personnel (and Garak) leave however, Sisko reveals that a Federation-Klingon task force used the distraction to destroy the shipyards on Torros III.
While that victory eases the burn, the loss of Deep Space Nine was one of the first, greatest losses of the Dominion War.