Spoils of War

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

Detailed walkthrough
Accept Proctor Ingram's request to retrieve the Beryllium agitator in the Mass Fusion building. Go to the top and use the elevator to go down to the reactor level. Take the agitator from the reactor chamber and return to Ingram.

Bugs

 * You may be booted out of the Vertibird after entering it. Reloading an earlier save and making sure Procter 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.