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This article contains information that no longer applies to the current version of Star Trek Online. The mission has been removed as part of the Romulan Mystery revamp, released with the 5 Year Anniversary Event on January 29, 2015.

In Preemptive Strike the player's vessel is sent to investigate the fate of a Starfleet task force in the Rator System, rescue any survivors, and confront a Romulan invasion force.


The I.R.W. Decius.

The player is sent to the Rator System to investigate the disappearance of a Starfleet task force on Rator III, and determine whether a Romulan fleet gathering there is a threat to the Federation. Upon entering the system, the player must defeat several warbird squadrons (including T'varo Light Warbirds, Mogai Heavy Warbirds, and Scorpion Fighters) and a number of turret emplacements. Once the defenses are down, the away team beams to a Romulan military base on the surface.

On Rator III, the player disables a transport inhibitor and rescues the survivors of the task force, who were captured by the Romulans. Their leader, Lieutenant Tess, reveals that the fleet is preparing to invade Federation space (with Vulcan likely their main target) and that they plan to collect a number of subspace weapons from Rator before the strike. After Tess and her team are beamed to safety, the player's team locates the weapons and destroys them before returning to their ship.

In orbit, the player's vessel joins the U.S.S. San Jose's assault fleet and participates on an attack on the Romulan fleet. Eventually the enemy flagship, I.R.W. Decius, is destroyed and the threat to the Federation averted for now.


Mission Text[]

We're at the turning point, <rank>.

Starfleet sent a task force to father intelligence in the Rator system. We now have reason to believe that Rator is the gathering point for a fleet that will cross the Neutral Zone and attack Federation space.

The task force has failed to report in, and there is a strong possibility that they have been taken prisoner by the Romulans. Starfleet Command has decided that it is time for decisive action.

We are sending a fleet to Rator with two goals – rescue our officers, and stop the Romulan fleet before it can cross the Neutral Zone. The <ship name> will be joining that fleet.

I don't need to tell you how important this is, <character name>. If this goes poorly, the Federation will be embroiled in a second war. The potential for loss of life is unimaginable.


Join a fleet going to the Rator System, located in the Hyralan Sector of the Psi Velorum Sector Block, to confront a Romulan invasion force.


  • First Strike
    • Go To Rator Prime
    • Defeat Romulan Squadrons (0/5)
    • Defeat Romulan Turret Emplacements (0/5)
    • Beam down to Rator III
  • Behind Enemy Lines
    • Go To Rator III
    • Disable Transporter Inhibitor
    • Check Ops Report
    • Rescue Starfleet Prisoners (0/7)
    • Check Ops Report
    • Plant Charges on Weapon Caches (0/3)
    • Beam up to your ship
  • The Empress Advances
    • Go To Rator Prime
    • Eliminate all Romulan Ships
    • Return to Sector Space
  • Report to Starfleet




NPC starships[]


There are a number of accolades available from this mission;

Icon Name Description How to Get Points
Removed from Romulan Possession icon.png Removed from Romulan Possession Rescue the Prisoners on Rator III 10
Annihilate the Armada icon.png Annihilate the Armada Destroy the Romulan Fleet 10


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

Mission Replay[]

This mission is repeatable through Mission Replay, although the Rewards for completing might be reduced. Items scale to a player appropriate level (Scaling Rewards), as followed:

Level Rank SP Exp Mark <>
28–29 Commander 1552 1338 VI
30–39 Captain 1743 1878 VIII
40–49 Rear Admiral LH & UH 1935 1856 X
50 Vice Admiral 2126 1856 XI


  • A lot of enemies on this mission can be skipped with stealth.
  • It is heavily implied, though not explicitly stated, that the Romulan invasion in this mission is the same "Operation Khelian" mentioned in “Divide et Impera”.
v · d · e
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”
Patrol Wrappers “Algira”“Almatha”“Alpha Centauri”“Alpha Trianguli”“Argelius”“Arawath”“Bajor”“Beta Ursae”“Bolarus”“Cardassia”“Celes”“Devron”“Dorvan”“Hromi”“Hyralan”“Iota Pavonis”“Kassae”“Kalandra”“Kern”“Kinjer”“Kora”“Mempa”“Mylasa”“Onias”“Orion”“Orias”“Pi Canis”“Psi Velorum”“Regulus”“Risa”“Sierra”“Sirius”“Tarod”“Tau Dewa”“Teneebia”“Vendor”“Vulcan”“Vanden”“Xarantine”“Z-6”“Zeta Andromedae”
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”