Star Trek: Deep Space Nine: Season 5, Episode 26 - ProjectFreeTV

5 - 26: Call to Arms

With continuing convoys of Jem'Hadar arriving in the Alpha Quadrant, Sisko decides to mine the wormhole to prevent further troop movement. However, this decision forces the Federation into a direct confrontation with the Dominion, and Gul Dukat responds by launching a massive assault fleet against DS9.