Spoils of War

Spoils of War is a Brotherhood of Steel main quest in Fallout 4.

Fly to Mass Fusion
Proctor Ingram explains that in order to fully power up Liberty Prime, they need a beryllium agitator. The only beryllium agitator available is located in the Mass Fusion building. Ingram insists that she should accompany the player character to get the agitator, because her technical knowledge will be essential for the mission. There is a Vertibird docked at the Prydwen that will fly to the roof of the Mass Fusion building when the player character is ready to go. Taking the Vertibird officially makes the player character get Banished from the Institute.

As the Vertibird closes in on the Mass Fusion roof, a contingent of synths will open fire. Take out as many as possible with the Vertibird's minigun. Make use of the various explosive containers spread across the roof. After a period of time, the pilot informs the player character that the Vertibird has sustained a dangerous amount of damage and needs to leave.

Jump to Mass Fusion's roof
At this point, the player character is given a prompt to disembark from the Vertibird and land on the roof. Clear out any remaining synths and head inside the structure.

Locate the beryllium agitator
Proceed to the upper level and take the Mass Fusion executive lab password and ID from a desk. Access the marked executive research lab terminal-- either with the password or by hacking if the password was left on the desk-- and read the file from 07-30-77 to determine the location of the agitator.

Retrieve the executive keycard
If the player character did not grab the ID before the previous step, leave the terminal room and take it from the desk on the left to complete this objective. The ID is needed to use the elevator that leads into the building.

Proceed to the reactor level
Use the ID on the card slot in the elevator to activate it. After a short spectacle of riding the elevator down while overlooking the Boston skyline, the player character will load into the building's interior. While the elevator slowly descends, synths will teleport into the building on the various platforms around the room and attack the player character and Proctor Ingram. As the elevator approaches a glass floor, the synths will set off an explosion, knocking out the power and stopping the elevator.

Next, the player character must reach the lobby either by reactivating the power and continuing to ride the elevator down, or by dropping down a hole in the floor and traversing to the bottom. If the player character chooses the latter, a number of synths will attack them along the way; choosing the former avoids most of these encounters (unless otherwise sought after the fact).


 * (Optional) Restore power to the elevator
 * There are two methods of turning the power back on: the player character can either hack a computer located in a room to the left of the elevator or climb to the floor above and throw a switch (also located in a room to the left).

The Strength bobblehead is located in the upcoming area.

Once in the lobby, take care of the nearby synths and head to the left to find the marked elevator. Swipe the ID card to open the doors and ride down to the reactor level. After exiting the elevator, head to the right and down the stairs to the control room.

Enter the reactor chamber
Removal of the beryllium agitator will trigger the security system, which consists of five ceiling-mounted turrets, a sentry bot, two assaultrons and two protectrons. If the player character cannot hack Master terminals, they may want to manually take out as many robots as they can access before going into the reactor chamber. Otherwise, they can hack the reactor security control terminal in the main control room. This terminal has the option to disable security, but it fails; instead, use it to open the security doors. Go into the now-open room that contains the inactive sentry bot and access the facilities terminal inside to disable the security system.

If the player character approaches Ingram, she will ask whether they have enough radiation protection on hand. Any answer given will lead to her giving the player character two Rad-Xs. Ingram indicates that there are probably some items lying around that can also help. There are three hazmat suits in the area - two regular, one damaged. One is in the locker room, on a locker's shelf. The other regular suit is on top of a safe in the office under the stairs next to the decontamination airlock. The damaged suit is in a drawer in front of the window of the airlock. Power armor is also a sufficient method of protection if the player character happens to be wearing it.

Head into the airlock and press the button. The doors will shut and the player character will be sprayed, which will cure any radiation poisoning. After decontamination, the door to the reactor chamber will open. The player character will begin soaking up a lot of rads upon entering the chamber, so be prepared before continuing.

Unlock the reactor
Walk up the scaffolding to the top of the room. Press the marked interlock release button to the right of the gray orb with blue lights in order to expose the agitator.

Take the beryllium agitator
Take the agitator from its housing, which triggers the security system if still enabled.


 * Eliminate reactor level security
 * If the security system was triggered, destroy all of the aforementioned active robots to complete this objective.

Exit Mass Fusion
Go back down the scaffolding and out of the reactor room. Press the button for the airlock and wait for the decontamination. Return to the elevator and take it back up to the lobby.

As the elevator ascends, another explosion occurs. The Institute has sent reinforcements, but so has the Brotherhood of Steel. Ingram will tell the player character to leave with the agitator while she stays behind. The player character can either heed her advice and run for the exit, or stay and help finish off the synths.


 * (Optional) Assist Brotherhood forces in the lobby
 * Staying until all of the synths are defeated will complete this objective.

Return to Boston Airport
Leave the building and travel back to Boston Airport.

Speak to Proctor Ingram
Once at the airport, speak to Ingram at the base of Liberty Prime to complete the quest. If Tactical Thinking is already finished, Ad Victoriam will begin. Otherwise, Ingram will take the beryllium agitator and store it until Ad Victoriam starts.

Bugs

 * You may be booted out of the Vertibird after entering it. Reloading an earlier save and making sure Proctor Ingram joins you may fix this issue.
 * It's possible to have Ad Victoriam not be given after completing Spoils of War.
 * Fix: Reload the game to a point before you made the decision to either choose the Institute or the BOS. Talk to Elder Maxson to make sure you start the quest Outside the Wire and From Within if available. Step into the Vertibird to start Spoils of War when these quests are completed.
 * After completion and once back at the Boston Airport, Ingram may remain silent and can't be interacted with (despite the quest marker above her head), thus making the final step of the quest impossible to complete.
 * One possible fix is to reload a save prior to accepting the quest, and during dialogue, insist to go alone to Mass Fusion building. She will stay at the airport and can be talked to when the mission is complete.
 * PC players can use the following console command to set the quest as completed:
 * If you destroy the Vertibird that you need to board just before accepting the quest while Ingram is outside, for example when the quest Liberty Reprimed is available, Ingram and the pilot will be on the ground under the Prydwen.
 * Objective will be displayed as outside the main building. Choosing to go up the elevator in order to reach the "quest marker" will cause you to fall out of the elevator.
 * When attempting to board the Vertibird, some companions may just stand on the edge of the Vertibird, unable to board because Proctor Ingram is in their way. Seen with: Danse, Preston Garvey, Nick Valentine, and Strong.
 * You may be unable to board the Vertibird to fly to Mass Fusion. Entering the Prydwen then exiting again seems to fix this. Another possible fix is telling Proctor Ingram she cannot join you.
 * You may get an event problem which causes no explosion to occur when riding the elevator with the agitator, which prevents completion of the quest. If fixed with console commands the next mission for Brotherhood will not be launched.

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