A planet whose Dominion shipyards were destroyed by a combined Starfleet and Klingon task force in 2373 while Dominion forces were occupied with seizing Deep Space Nine.
Torros III held important shipyards used by the Dominion and its Cardassian allies. It is mentioned in Call to Arms, the finale of Deep Space Nine's fifth season.
As the Dominion fleet bears down on the station, Sisko holds out as long as he can without reinforcements. Starfleet has chosen to send its ships elsewhere. Once he has evacuated, the reason becomes clear. While the enemy concentrated on Deep Space Nine, a Federation and Klingon force crossed the border and wrecked the yards at Torros III.
The raid gives the alliance some compensation for the loss of the station and the wormhole at the outset of the Dominion War.