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The latest Star Trek Online story update, Season Twenty-four: Reflections, is now live!

Spoiler warnings ahead!


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This article contains information that no longer applies to the current version of Star Trek Online. It is provided only for historical purposes.
This article is about the Tour of Duty mission. You might be looking for the Undine Front mission of the same name, or “Assimilation (Borg Advance)”.
Faction Starfleet.png Assimilation
Followed by:
“Line in the Sand”
Story Arc:
Tour of Duty
180 Expertise icon.png

In Assimilation the player helps defend the Vega Colony against the Borg Collective.


The player beams down to a fortified position on Vega IX. Commander Kelly is coordinating the defense of the colony. He explains, that the Borg are rounding up colonists, but have not made a move to assimilate them. He orders the player to get equipped by Ensign Byarnez, who hands out rifles and kits. When armed and ready, the player heads out to rescue colonists from the Drones.

Kelly realizes, that the Borg are building communication arrays in an attempt to contact the Collective for reinforcements. Thus he orders the player to disable the heavily guarded installations. After disabling the structures defenses, the player is able to shut down the array. Kelly restores contact with Starfleet and the player returns back to the ship for new orders.

In orbit of Vega, Admiral Quinn hails the player to coordinate a final maneuver to push the Borg out of the system. The ship warps out to meet with the Federation fleet.


Mission Text[]

Commander Kelly is holding a position on Vega IX against the Borg. There are five Borg fortifications with active transmitters and forcefields, and the colonists are being rounded up. Speak to Commander Kelly and do what you can to help turn the tide.


Help Commander Kelly defeat the Borg in the Vega System.


  • Speak to Commander Kelly
  • Get Equipped
  • Equip Your New Gear
  • Talk to Commander Kelly
  • Rescue Colonists (4)
  • Speak with Commander Kelly
  • Shut Down Transmitter
    • Lower Forcefield
    • Shut Down Array
  • Talk to Commander Kelly
  • Return to Ship
  • Go To Vega Colony



There are no accolades specific to this mission.


For a walkthrough of this mission, visit the Walkthrough page.


  • Replaced by new tutorial missions in Season Eight: The Sphere and removed from game on November 12, 2013. As such the information on this page is outdated.
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Removed Missions