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Haylen, Rhys...it's time to welcome our newest recruit to the Brotherhood.Paladin Danse

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

Quick walkthrough

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

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 jobs:

Once either of the requisite quests have been done, the quest The Lost Patrol may begin after talking to the Lancer Captain.

This quest will be marked as completed once both requisite quests have been completed once each. The requisite quests are repeatable whether or not this quest has been completed.

Quest stages

Quest stages
StageStatusDescriptionLog Entry
10 Talk to Paladin Danse at the Cambridge Police Station.I've refused to join the Brotherhood of Steel, but if I wish to reconsider, Paladin Danse has told me to return to the Cambridge Police Station.
200 Support the Brotherhood Recon Team.I've accepted Paladin Danse's offer to join the Brotherhood of Steel. Now that I'm a member of the team, I should assist Knight Rhys and Scribe Haylen with their current assignments.
210 Finished Rhys' assignment.
220 Finished Haylen's assignment.
255Quest finishedQuest CompleteI've completed my initial assignments for Knight Rhys and Scribe Haylen.
355Quest failedQuest 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.
  • With the Far Harbor add-on installed, either Rhys or Haylen may assign mission to a location in Far Harbor.

Behind the scenes

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


PCPC Playstation 4Playstation 4 Xbox OneXbox One 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 is 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.[verified]