Call to Arms is a Brotherhood of Steel Faction Quest in Fallout 4 (FO4). Read on for a full Call to Arms walkthrough and learn Call to Arms location and rewards.

Previous Quest	Next Quest
Fire Support	Semper Invicta

Call to Arms Quest Summary

Call to Arms Overview
"Help Paladin Danse clear out the ArcJet Systems and retrieve the Deep Range Transmitter."
Faction	Brotherhood of Steel
Quest Giver	Paladin Danse
Quest ID	0006F5C1
Rewards	・ XP: 423 ・ Righteous Authority

Call to Arms Walkthrough

Call to Arms Objectives

1. Talk to Paladin Danse
2. Follow Paladin Danse to ArcJet Systems
3. Get the ArcJet Systems Password
4. Defeat the Synths
5. Follow Paladin Danse to the ArcJet Engine Core
6. Restore the Power in the ArcJet Engine Core
7. Proceed to the Control Room
8. Kill All the Synths in the Control Room
9. Retrieve the Deep Range Transmitter
10. Exit the ArcJet Systems

Talk to Paladin Danse

After completing the Fire Support quest, head inside the Cambridge Police Station and talk to Paladin Danse. Let him know you are ready to start the progressing the quest.

Follow Paladin Danse to ArcJet Systems

Once ready, follow Paladin Danse to the ArcJet Systems. As he leads the way, expect attacks from a few raiders and creatures. Be sure to defeat them to clear the path!

Get the ArcJet Systems Password

Keep following Paladin Danse as he leads you inside the ArcJet Systems. Along the way, you'll encounter a locked gate requiring an ArcJet Systems Password. To open it, access the terminal on the right side and select the second command to generate a new password. Then, use the new password on the terminal in the middle to unlock the gate.

Defeat the Synths

Behind the gate, a horde of Synths will be waiting to attack. Defeat them all to clear the way for Paladin Danse.

Follow Paladin Danse to the ArcJet Engine Core

After defeating all the Synths, follow Paladin Danse to the ArcJet Engine Core. Head further down until you reach an inactive elevator.

Restore the Power in the ArcJet Engine Core

Enter the Maintenance Room and head further back to access the terminal. This terminal requires hacking, but once you've gained access, simply select the command to restore the power back.

After restoring the power, return to the engine core and help Paladin Danse in defeating all the Synths ambushing him.

Proceed to the Control Room

After defeating all the Synths, access the elevator and head down to the Control Room. With the power restored, the elevator will now be fully functional, and you should be able to use it with no problems.

Kill All the Synths in the Control Room

As you enter the Control Room, more Synths will attack. Defeat them all to clear the room and safely search for the Deep Range Transmitter after.

Retrieve the Deep Range Transmitter

Examine all the Synths you defeated. One of them carries the Deep Range Transmitter, so simply loot it from them to proceed.

Exit the ArcJet Systems

After finding the Deep Range Transmitter, exit ArcJet Systems and speak to Paladin Danse. He will reward you with the Righteous Authority for accompanying him in this quest.

Join the Brotherhood of Steel

Also during this conversation, Paladin Danse will invite you to join the Brotherhood of Steel. Accept the invitation to officially become a member of the Brotherhood!

Previous Quest	Next Quest
Fire Support	Semper Invicta

Call to Arms Location

Where to Start Call to Arms

Map View	Cambridge Police Station
Quest Giver	Paladin Danse

Fallout 4 Related Guides

All Factions List

List of All Factions

All Joinable Factions
Minutemen	Brotherhood of Steel
The Railroad	The Institute

Full Brotherhood of Steel Questline

The Brotherhood of Steel Quests
1	Reveille
2	Fire Support
3	Call to Arms
4	Semper Invicta
5	Shadow of Steel
6	Tour of Duty
7	Show No Mercy
8	From Within
9	Outside the Wire
10	Liberty Reprimed
11	Blind Betrayal
12	Tactical Thinking
13	Spoils of War
14	Ad Victoriam
15	The Nuclear Option
16	A New Dawn