Spoils of War

Spoils of War is a quest that can be obtained within the Commonwealth, in Fallout 4.

Synopsis
With Liberty Prime nearly ready to help assault the Institute forces, a final component is needed, in the form of a Beryllium agitator. Now it is a race against time, as the Institute are also actively searching for the agitator, and have already infiltrated Mass Fusion before the BoS can arrive.

Walkthrough

 * 1) Speaking with Proctor Ingram will reveal that Liberty Prime needs a final component in order to reach fully functioning capacities, with the component needed, being in a hidden area within Mass Fusion. However, the Institute have already reached Mass Fusion, and so the BoS are sending in the Sole Survivor in order to take down their forces and retrieve the Beryllium agitator first.
 * 2) At this point, the Sole Survivor has one final chance to ally themselves with the Institute over the BoS. Warning Father of the Brotherhood's plans, will permanent make the BoS hostile, and will begin the quest: Mass Fusion.
 * 3) Allying with the BoS, the Sole Survivor will arrive at Mass Fusion via Vertibird, and will gain access to the building through the roof. As the Sole Survivor travels down into the building's depths, they will be forced to deal with a large synth presence, in order to reach the executive research lab terminal, where they can obtain the necessary Mass Fusion executive lab password and Mass Fusion executive ID.
 * 4) Afterwards, restore power to the nearby elevator, by either hacking the respective terminal, or by heading back up to flip the circuit breaker.
 * 5) Once the elevator has been powered up, the executive ID card can be used to access the basement level, where the Beryllium agitator is being held.

Beryllium agitator

 * 1) After going through the decontamination chamber, grab the agitator, in which the building's automated security will activate, forcing the Sole Survivor to deal with their presence in order to take the elevator back up to the lobby.
 * 2) Upon reaching the lobby, a fight between Brotherhood soldiers and the surviving synth forces will be encountered, in which an optional objective will appear, in which the Sole Survivor can help the BoS take down their opposition.
 * 3) After Mass Fusion has been cleared, return to Proctor Ingram at the Boston Airport.