Conflict on the Island

The Conflict on the Island is a cold war between the three factions on the Island in 2287.

Background
The great unrest on the Island is fundamentally rooted in the hazardous weather condition known as "the Fog," a fog that periodically blankets the Island, bringing with it radiation and all of the problems that come with radiation, including hostile creatures, sickness, and poor crop yield. When the synth colony of Acadia was founded, its leader, DiMA, pitied the people of Far Harbor for the hardships they endured as a result of the Fog. DiMA and one of his co-founders, Faraday, developed fog condensers - devices that were able to keep the Fog at bay and were powered by their wind farm. The people of Far Harbor begrudgingly accepted these condensers but disliked the fact that they had become reliant on others as they greatly valued their independence and self-sufficiency.

In the mid-2270s, the Children of Atom arrived on the island, taking up residence in an old submarine base they christened "The Nucleus." This submarine base was left to the Children by DiMA, who had previously lived there. DiMA became friends with the leader of the Children at the time, Confessor Martin. Their friendship, plus DiMA's bequeathing of the Nucleus to the Children, resulted in good relations between them and Acadia.

Relations between the Children and Far Harbor were far less friendly, however, as the Children saw Far Harbor's resistance against the Fog as an affront to their beliefs. At the same time, the residents of Far Harbor blamed the Children for the Fog's increasing encroachment on their territory.

Two events triggered an escalation in the conflict on the Island. The first was the killing of one of the Children's missionaries by Allen Lee, a weapons merchant of Far Harbor and an outspoken opponent of the Children's presence on the Island. The second event was the disappearance of Confessor Martin and the subsequent elevation of Tektus as the new high confessor of the Children of Atom. Tektus was far more draconian in his faith and than his predecessor and wished for a more violent approach in dealing with Far Harbor. Relations also worsened between the Children and Acadia, as Tektus was offended by DiMA and his followers for aiding Far Harbor by providing them with the fog condensers.

DiMA, desperate to avoid an all-out war, came up with a plan to deescalate hostilities, at least between Far Harbor and the Children. He kidnapped and killed the leader of Far Harbor, Captain Avery, and proceeded to replace her with a synth. This synth Avery was returned to Far Harbor in order to act as a voice of reason in order to prevent the Harbormen, the fisherman's militia of Far Harbor, from outright attacking the Children. He also came up with a contingency plan to wipe out both the Children and Far Harbor should they threaten Acadia. He saved the key to detonating the nukes aboard the Nucleus, which would give him the ability to annihilate the Children, and held the password to turn off the wind farm powering the fog condensers, allowing him to give Far Harbor back to the fog and its creatures. Feeling great grief over all he had done and planned, DiMA had those memories removed and hidden from him so I would not have to deal with the guilt.

Events of Fallout 4
In 2287, the Sole Survivor will journey to the Island via boat under the employ of Valentine's Detective Agency in search of a girl who fled her parent's home, Kasumi Nakano, to due believing that she was a synth. While investigating there, the Sole Survivor will learn that Kasumi went to Acadia to live among the other synth refugees. When they visit her there, DiMA will ask the Sole Survivor for help in solving the conflict, and believes that the key to doing so is finding the memories he had previously hidden from himself.

Upon unlocking his memories, DiMA will be shocked to find out what he had done, and will suggest a number of solutions to the conflict. From there, the conflict can come to a head and be solved in a number of ways.

The Sole Survivor can convince DiMA to turn himself into Far Harbor for Captain Avery's death, which will result in his execution, and possibly an assault on and destruction of Acadia by the Harbormen if the Sole Survivor's reputation with Far Harbor is low, leaving only Far Harbor and the Children on the Island if that is the case. If his reputation with Far Harbor is high, Acadia will be spared.

Conversely, the Sole Survivor can also keep the death of Captain Avery a secret, and destroy one or both of the factions threatening Acadia. They can use the key to blow up the Children, doing so by either manual entry of the key or by convincing the Children to do this themselves. This will leave Acadia and Far Harbor on the Island. Instead, they can turn off the wind farm powering the fog condensers protecting Far Harbor, resulting in the overrunning of the town by the creatures of Far Harbor, and the town's subsequent destruction. This will leave only the Children and Far Harbor. Lastly, the Sole Survivor can do both, resulting in only Acadia surviving.

The Sole Survivor can also engineer a peace by keeping the death of Captain Avery a secret and assisting DiMA in replacing Confessor Tektus with a less zealous synth version, either killing him or chasing him off the Island in the process. This will result in a three-way peace between the factions.

The Sole Survivor can also cause the War of the Commonwealth to bleed into Far Harbor, by either informing the Railroad, the Brotherhood, or Institute of the existence of Acadia. The Railroad will set up contacts with Acadia to help save more synths, the Institute will send gen 2 synths to recapture the synths, and the Brotherhood will send Knights in Vertibirds to kill the synths. The latter two options result in the destruction of Acadia.

Whatever the Sole Survivor chooses (aside from informing the Railroad of Acadia), the Conflict on the Island ends.

Battles

 * Battle of Acadia (optional)