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This article contains information that no longer applies to the current version of Star Trek Online. This mission was removed on April 26, 2018 and replaced with “Romulan Imperial Minefield”.
Faction Starfleet.png Halting the Gorn Advance
600 Expertise icon.png
(daily) 50 Fleet Marks
You will receive the following reward:
  • Green, blue or purple item
Plus one of the following:

Halting the Gorn Advance (also known as Gorn Minefield) is a fleet action available for Federation players.

This mission is the Federation counterpart to the Klingon fleet action “Punch Through the Federation Blockade”.

Mission Text[]

We don't know much about the Gorn, <rank>, but we have learned a little about why they're so aggressive toward other races.

According to Gorn histories, thousands of years ago the Gorn Hegemony controlled hundreds of worlds. The Gorn believe all of those planets are still theirs to rule, and that anyone who has settled there since are interlopers.

Now that the Gorn have the backing of the Klingon Empire, they've become much more active in their efforts to eject, "invaders" from planets like these. There are Gorn ships besieging a planet in the Tostig System in Argelius Sector Space, and we would like you to deal with them.


Proceed to the Tostig system, which is in the Argelius Sector of the Regulus Sector Block, and stop a Gorn invasion force.


  • Freeing the Miners
    • Rescue Ships from Mines (0/10)
  • Repair Mining Facilities
    • Repair mining facilities (0/3)
  • Defeating the Dreadnought
  • Recover Mineral Samples (0/4) (Daily)






NPC starships[]




Icon Name Requirements Points Unlocks
Swept Up icon.png Swept Up 1st Place in the Gorn Minefield Fleet Action 10 "Halting the Gorn Advance" floor trophy


There is no walkthrough for this mission, yet. You can help STOWiki by writing it here.


  • The reward to choose one kit is bugged in the game. Do not believe the reward for the kit. This bug was reported currently to the GM's in the game, and they are aware of it. This bug appears to not give reward due to not being able to actually finish this mission. (As of February 14, 2013, this bug has been fixed. This has not been tested yet though. Source:
  • In November 2012, the objectives and map of this mission were adapted to reflect those of its Klingon counterpart “Punch Through the Federation Blockade”, thereby reducing the required time and players.
    • This had the effect of breaking the "(daily)" wrapper mission, a bug which would not be corrected until February 2013.
  • The voice clips from Commander Burgess are taken from his dialogue in cutscenes from “The Doomsday Device”.
  • Until 2014, Chancellor J'mpok himself commanded the Kal'Ruq. Any reference to J'mpok being aboard the ship during its possible destruction has been removed in order to preserve continuity.
  • Coming in first place results in the accolade Swept Up and the following floor trophy:
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Removed Missions
Tour of Duty “Prelude to a Crisis”“Khitomer Crisis”“The Price of Liberty”“Assimilation”“Gather Equipment”“Line in the Sand”“Skills Trainer”“New Orders?”
Tour First City/Tutorial “Honor Bound”“Lighting the Way”“First City”
Klingon War “War is Good for Business”“Hide and Seek”“Stop the Signal”“The Kuvah'Magh”“Treasure Trading Station”“Task Force Hippocrates”“The Ultimate Klingon”“City on the Edge of Never”“Past Imperfect”
Warzone “Test of Mettle”“Second Star to the Right, Straight on 'til Morning”“Keep Your Enemies Closer”
Vigilance “A House Pursued”“House on Fire”
Fek'Ihri Return “The Gates of Gre'thor”
Romulan Mystery “Under the Cover of Night”“Minefield”“Divide et Impera”“Saturday's Child”“Preemptive Strike”“Hunting the Hunters”“Project Nightingale”“By Any Means”“Ground Zero”“Ghost Ship”“Friend of My Enemy”“Taris”“Trapped”“S'harien's Swords”
Cardassian Struggle “Venture into Deep Space”“Badlands”“Suspect”“War Games”“Shutdown”“Rapier”“Forging Bonds”“The Long Night”“The Tribble with Klingons”“Tear of the Prophets”“Crack in the Mirror”“The New Link”“Seeds of Dissent”“The Other Side”“Cage of Fire”
Borg Collective “Collateral Damage”“Asset Recovery”“State of Q”
Undine Advance “Assimilation”“The Return”“Fluid Dynamics”“A Light in the Dark”
New Romulus “Beginning of a New Future”“Lending a Hand”“New Romulus Transporter System”
Delta Quadrant “With Friends Like These...”
PvE/Fleet Actions “Big Dig”“Breaking the Planet”“Distress Call”“DS9 under Siege!”“Fluidic Space Fleet Action”“Foxes and Hounds”“Halting the Gorn Advance”“Mine Trap”“Mirror Universe Incursion”“No Win Scenario”“Punch Through the Federation Blockade”“Slowing the Expeditionary Force”“Starbase 24”“Starbase 24 Rescue”“Terradome (Federation)”“Terradome (Klingon Empire)”
TFO Wrappers “Romulan Imperial Minefield”“Romulan Mystery”“Cardassian Struggle”“Borg Advance”“New Romulus”“Solanae Dyson Sphere”“Delta Quadrant”“Age of Discovery”
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Diplomacy &
“A Good Start”“Chart the Azlesa Expanse”“Chart the B'Tran Cluster” “(Vice Admiral)”“Craft Delta Flyer”“D'kel Star Cluster Exploration” “(Commander)”“Diplomatic Investigations”“Eridon Nebula Exploration: Captain”“Eridon Nebula Exploration: Commander”“Explore Strange New Worlds”“Explore the Afehirr Nebula”“Explore the Arucanis Arm”“Explore the B'Tran Cluster” “(Vice Admiral)”“Explore the Betreka Nebula”“Explore the Delta Volanis Cluster”“Explore the Eridan Belt”“Explore the Hromi Cluster” “(Investigate Anomalous Readings)” “(Investigate Planet)”“Explore the Khazan Cluster”“Explore the Rolor Nebula”“Explore the Zenas Expanse”“Family Ties”“First Contact”“Hostile Takeover”“Outreach”“Quarantine”“Salvage Dispute”“Shady Supplies”“Taste of Home”“T'Ong Nebula Exploration: Lieutenant”“T'Ong Nebula Exploration: Lieutenant Commander”“To Boldly Go”“To Boldly Go: Explore the Afehirr Nebula”“To Boldly Go: Explore the Arucanis Arm”“To Boldly Go: Explore the B'Tran Cluster”“To Boldly Go: Explore the Betreka Nebula”“To Boldly Go: Explore the Eridan Belt”“To Boldly Go: Explore the Hromi Cluster”“To Boldly Go: Explore the Khazan Cluster”“To Boldly Go: Explore the Rolor Nebula”“To Boldly Go: Explore the Zenas Expanse”“The Needs of the Many”“We Need Breathing Room”
Handover/Rank “Aid the Deferi”“Promotion Lieutenant Commander (Klingon)”“Report to Battle Group Omega”