The story starts at the Castle-like building. On the shoreline of Quincey Boston. It is the main head of the commonwealth's minutemen.
The Minutemen are the ones responsible for the protection of the Commonwealth of 2100s. We have changed from our scared and weak group. To a force of many. And that many have come together to free the rest of the area.
That is their goal and to continue that conquest we must recruit others for the military like group that are the Minutemen. They have become the dominant group in the Commonwealth. That is what they thought until we started getting resistance. This resistance was very unexpected, they were once a past menace to the commonwealth.
This Menace was called the Brotherhood of Steel also referred to as BOS. The came here with a ship called the Prydwen. The Prydwen had been their main way of travel to the commonwealth for who knows where. But something followed them here and they were the Enclave.
The Enclave are a group that are quite like the BOS group. But the BOS has made them their enemies, and now they have driven them here to the outskirts of the commonwealth. The Enclave are the personification of tech. The group has origins in pre-war America. The Enclave partnered with another pre-war American organization called vault tech.