Trapper Attack

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

Quick walkthrough
Defend the settlement from trappers.

Detailed walkthrough
While in a settlement in Far Harbor, a settler may approach the player character requesting for help against an incoming attack of a trapper party. Upon accepting to help, trapper attack groups will spawn around the settlement, and the player character must then hold off the attack.

Once all attackers are dead, return to the settler who requested help, who will tell the player character where the trappers are coming from, and suggests to aid the player character in retaliating against the attack. If accepted, the settler turns into a temporary companion, and leads the way towards the marked place.

Regardless of whether the player character accepts the settler's help or not, the next objective is to travel to the marked location and eliminate all trappers. Once the marked enemies are dead, return to the settler and tell them the attackers are gone to complete the quest.