Semper Invicta is a Brotherhood of Steel main quest and achievement in Fallout 4.

Quick walkthrough

Quest: Semper Invicta
Return to Cambridge police station.
Speak to Paladin Danse.
Support the Brotherhood recon team.
Reward: 300 XP
Leads to: Quartermastery, Cleansing the Commonwealth, The Lost Patrol, Shadow of Steel

Detailed walkthrough

Once the Survivor completes the quest Call to Arms, this one will show up automatically, asking the player character to go back to Cambridge police station and talk with Danse.

After the discussion, Danse asks the Sole Survivor to help both Rhys and Haylen doing their respective job.

The quest will complete once the requisite quests have been completed (either one). The requisite quests are repeatable whether or not this quest has been completed.

Once the job is done, the quest The Lost Patrol will begin.

Quest stages

10 Talk to Paladin Danse at the Cambridge Police Station.
200 Support the Brotherhood Recon Team.
210 Finished Rhys' assignment.
220 Finished Haylen's assignment.
255Icon checkQuest Complete
355Icon crossQuest Failed


  • The Vault-Boy's animation for this quest is the same as that in the "Connection Error" state in the Fallout Pip-Boy companion app.
  • If Paladin Danse is spared during the quest Blind Betrayal, Haylen can be removed from the game upon completion, making it impossible to complete this quest without use of console commands. The quest marker will still be attached to her location, but as she's disabled and under the world, there is no way to interact with her, or even reach her. This can be addressed by entering prid 5de4b, followed by moveto player, and finally enable. She should then be able to give the player Quartermastery as normal.

Behind the scenes

Semper invicta is Latin for "always invincible.". It is also the motto for the city of Warsaw, Poland since World War II, a testament to the strength of the city.

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