Fallout 4 Call To Arms Quest Walkthrough

11 August 2026 | 57

Navigating the early stages of the Commonwealth wasteland often leads players toward powerful factions looking for capable recruits. Completing the introductory Brotherhood of Steel missions unlocks access to superior weaponry, valuable ammunition supplies, and reliable armor modifications. This detailed walkthrough ensures you can successfully assist the military remnants and conquer the challenges hidden deep within the ruins.

Meeting Paladin Danse at Cambridge

Your tactical journey formally begins at the Cambridge Police Station after answering a frantic military distress frequency on your Pip-Boy radio. Upon arrival, you must assist a squad of stranded soldiers defending their fortified position against waves of aggressive feral ghouls. Speaking with Paladin Danse after the skirmish triggers the request to retrieve advanced technology from a nearby aerospace facility.

Before departing the station, players should thoroughly scavenge the immediate perimeter for leftover ammunition and medical supplies. Following the heavily armored commander across the war-torn urban grid ensures you stay protected from wandering raiders. Your destination is the abandoned ArcJet Systems facility, which holds the vital component needed to restore their long-range communications network.

Infiltrating the ArcJet Systems Facility

Approaching the grand entrance of the corporate facility requires caution as automated defensive measures may still remain operational inside the corridors. Once Paladin Danse opens the primary security doors, you will encounter hostile synth scavengers sent by the mysterious Institute faction. Utilizing high-caliber ballistic firearms or energy weapons will help you dismantle these robotic adversaries efficiently.

The interior architecture consists of multiple levels filled with collapsed machinery and locked computer terminals that contain deep pre-war lore records. Navigating deeper into the structure reveals broken pathways that require careful jumping and spatial awareness to avoid hazardous radiation pockets. Players should keep close tabs on their companion to ensure the squad does not get separated during sudden firefights.

Restoring Auxiliary Power to the Core

Progressing to the lowest levels brings your party to the massive engine core chamber where a vertical rocket engine stands fully intact. To advance further up the facility, you must locate a functional terminal nearby to restore auxiliary power to the facility elevator grids. This task requires bypassing a minor system lock while your Brotherhood ally holds a defensive position against incoming enemy waves.

If you choose to activate the main engine test firing sequence from the control room, the resulting blast will incinerate the hostile synths filling the lower chamber floor. Fortunately, the heavy power armor worn by your commander protects him from sustaining fatal damage during the fiery engine discharge. Clearing the remaining mechanical threats allows you to safely utilize the restored elevators to reach the upper command deck.

Securing the Deep Range Transmitter

The final confrontation occurs in the primary control room where the final wave of synthetic forces guards the valuable corporate technology. Defeating these high-level units rewards players with unique energy rifles and rare fusion cells that boost your long-term combat capabilities. Searching the central console allows you to recover the Deep Range Transmitter asset required to complete the objective.

Exiting the facility through the service elevator leads you back out to the surface wasteland where you can finalize the agreement. Speaking with the commander outside grants you the legendary Righteous Authority laser rifle as a permanent quest reward for your battlefield bravery. Accepting his official invitation to join the Brotherhood ranks formally unlocks the next major chapter of their faction storyline.