According to Memory Alpha's original in Universe Timeline, the story sequence is:
Once More Unto the Breach : The Siege of AR-558 : Nothing Human.


On a supply mission to AR-558 near the Chin'toka system Sisko beams down and finds only one third of the original Starfleet team alive. They are securing a Dominion communications array. He decides to stay with an away team as a reinforcement for the war-weary troops. On a reconnaissance mission to the Jem'Hadar camp, Nog is severely hurt, and Bashir has to amputate his leg. In the meantime, Ezri and engineer Kellin have found a way to disable Dominion anti-personnel mines that hide in subspace and use them against the Jem'Hadar. With most of them killed by the mines, Starfleet fights a fierce battle against the remaining Jem'Hadar and eventually wins, but takes heavy losses too.

New supplies of troops arrive via the USS Veracruz, as well as a dedicated tech crew to commandeer the relay station; the Veracruz is also evacuating the wounded, including Nog, who will be fitted with a prosthetic limb.[N 2] With control of the comm relay, Starfleet will be able to tap into Dominion communications throughout the entire sector.

Errors and Explanations

Nit Central

  1. Murray Leeder on Monday, November 16, 1998 - 9:06 pm: So the Defiant is under attack (and has not raised shields yet, might I add), and Sisko tells them not beam the away team up. That's fine, but couldn't he ask for some more weapons or troops or something? That would have come in handy. There may not have been any more to spare – the Defiant isn’t exactly a big ship!
  2. Bitmap on Tuesday, November 17, 1998 - 7:35 pm: From the commercial it looks like the federation phaser rifles were shooting bullets! At least they didn't appear to be firing any noticable beams. Am I mistaken on this? Charles Cabe on Tuesday, November 17, 1998 - 8:07 pm: They probably didn't have time to put in the special effects. Or they've reverted back to bullets unless the Borg return.
  3. Steve Oostrom on Tuesday, November 17, 1998 - 9:31 pm: If this is such an important communications outpost, why not have ships in orbit? Why not have a larger crew of defenders and engineers to study the communications system? Why not attempt to build more powerful defenses? Federation resources could be spread too thin to permit this.
  4. I see Worf was allowed to command the Defiant again. Sisko told him he never would get that chance again, but Jadzia's death probably meant that threat was no longer in effect. Kate Grosmaire on Wednesday, November 18, 1998 - 7:54 am: Re: Worf being in command of the Defiant. When Capt Sisko told him at the end of Change of Heart that he would probably never get a command, I thought he was saying that Worf would never be promoted to captain and given his own ship (or space station). I don't really see the Defiant as "his." He commands it on missions, just as Jadzia did last year during the war. But it's not like the Defiant is Worf's ship, as the Enterprise D or E are Picard's ships. The Defiant belongs to DS9 and I see it as Sisko's ship. And he just lets Worf take it out on a spin every now and then. As for things changing now that Jadzia is dead. That does not change the fact that Worf did what he did during Change of Heart. He will be denied a command because of the decision he made to return to Jadzia, not just because he was married. Kate Grosmaire on Wednesday, November 18, 1998 - 7:54 am: Worf is first officer of the Defiant and has been identifed as such. He is in command of the ship if Sisko is unavalible, just as Riker was in command of the Enterprise when Picard wasn't there.
  5. Brian Henley on Saturday, November 21, 1998 - 1:49 pm: Why do the Jem'Holo'dars react when they get shot? Shouldn't the phaser blasts just go right through them? Not if they were solid holgrams programmed to respond in the same way as real Jem'Hadar!
  6. Shane Tourtellotte on Saturday, November 21, 1998 - 6:32 pm: Why wasn't the Defiant cloaked on its way to AR-558? Did the Romulans finally make them give the cloaking device back? They probably felt it necessary to minimise their power usage.
  7. Did anybody else think the Jem'Hadar tactic of "drop your camouflage and run in screaming" a little too--how shall I put this—stupid? Brian Webber (Bwebber) on Saturday, November 21, 1998 - 10:12 pm: Psychological warfare. I learned this from playing the Wing Commander games. The Kilrathi (the bad guys of WCs 1 through 3) always decloaked their stealth fighters at least a full minute before they attacked. They use it to try and scare the enemy. A scared enemy won't fight as well. CdnTim 1613 EST 18 Feb 2021 - We seem to have seen in Rocks and Shoals and Hippocratic Oath that emotionally compromised Jem'Hadar can't shroud; making an attack might disrupt whatever "stealth focus" is required to maintain the shroud too.
  8. Harvey Kitzman on Sunday, November 22, 1998 - 8:10 am: I have a question about Nog. Shouldn't he technically be a cadet? I don't think he graduated from Starfleet Academy. Did he get a battlefield commission? Did I miss something Phil? And, if he hasn't graduated, why is he in a combat situation? Don't get me wrong, I like Nog - he has come a long way from the annoying little jerk in the beginning of the series. He is being refered to as an ensign, implying that he has graduated. Joel Croteau on Monday, November 23, 1998 - 12:05 am: Actually, Nog was given a field promotion to ensign sometime last season.
  9. Hans Thielman on Sunday, November 22, 1998 - 12:49 pm: The Defiant is a combat vessel, not a freigher. Why, then, was it ferrying supplies? I saw no indication that the Defiant was serving as an escort vessel. A dedicated transport ship would have been too vulnerable.
  10. Aaron Dotter on Tuesday, November 24, 1998 - 8:07 pm: The whole battle at the end, while very nicely done, never should have happened IMHO. Why not call up to the Defiant and tell Worf to lock a Quantum Torpedo onto the coordinates of the Jem'Hadar camp and blow it away? I didn't hear any reason why they couldn't. It was three Km away, so doing that shouldn't have affected the transmitter. Anonymous on Tuesday, November 24, 1998 - 10:56 pm: Umm.. pretty sure a Quantum torpedo would take out more than a Jem'Hedar camp. Aaron Dotter on Wednesday, November 25, 1998 - 6:02 pm: Well, OK, maybe not a Quantum Torpedo, but anything launched from a ship in orbit, like Photon Torps, phasers, A-Bombs, napalm, that could have killed the Jem'Hadar before they attacked would have saved the lives of all those Starfleet people. SeniramUK 15:45, July 19, 2019 (UTC) There was too great a risk of an incoming projectile being deflected or destroyed before it reached it's target!

Ex Astris Scientia

  • Anthony Rodger: If the Jem'Hadar can project attacking holograms and send mines through subspace, wouldn't that mean that they can in fact do anything anytime, projecting holographic camouflage for their forces or destroying the enemy with subspace weapons? And what about transporters? They not be able to generate/maintain enough power for that!


  1. According to the episode list, the provisional stardate for this episode is 52352.
  2. Nog's recovery is detailed in the episode It's Only a Paper Moon

Deep Space Nine Season 7
Image in the Sand IShadows and Symbols I Afterimage I Take Me Out to the Holosuite I Chrysalis I Treachery, Faith and the Great River I Once More Unto the Breach I The Siege of AR-558 I Covenant I It's Only a Paper Moon I Prodigal DaughterI The Emperor's New Cloak I Field of Fire I Chimera I Badda-Bing, Badda-Bang I Inter Arma Enim Silent Leges I Penumbra I Til Death Do Us Part I Strange Bedfellows I The Changing Face of Evil I When It Rains… I Tacking Into the Wind I Extreme Measures I The Dogs of War I What You Leave Behind
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