Search and Destroy

 is a quest in the Fallout 4 add-on Far Harbor.

Synopsis
By reporting the location of Acadia to Knight-Captain Kells, the Brotherhood will agree to prepare an attack force. A Vertibird will be refitted for long-range flight and allow for exterminating the synth threat.

Walkthrough

 * 1) Report to Kells and explain the situation with Acadia. After enough persuasion, he will agree to form an attack force against the synth settlement. This will exclude informing either of the other two factions.
 * 2) Meet Knight-Captain Larsen at the staging area south of Rayburn Point.
 * 3) Tell them to start the assault and head to Acadia.
 * 4) Sweep and clear. DiMA can put up a fight with his custom rifle, but otherwise the key danger comes from the sheer amount of targets.
 * 5) Return to Knight-Captain Larsen.

Bugs

 * Larsen and his team move through the worldspace in real time. They will not teleport to Acadia automatically, so you will need to wait for them to arrive to complete the quest or have their assistance.