Brotherhood First Expeditionary Force

The Brotherhood First Expeditionary Force is a faction comprised of Brotherhood of Steel soldiers sent from Lost Hills to re-establish contact with the Appalachian Brotherhood.

Background
When Roger Maxson formed the Brotherhood of Steel following the Great War, he used surviving satellites to communicate with survivors across the country, attempting to recruit them into the Brotherhood. He succeeded in contacting Elizabeth Taggerdy, who formed a Brotherhood chapter with her ranger unit in Appalachia.

Contact was lost with Taggerdy when the satellites failed, and the Western Brotherhood was left unaware of the outcome of the Appalachian chapter's war against scorchbeasts and the accompanying Scorched Plague.

Paladin Leila Rahmani led the First Expeditionary Force on their cross-country journey from the Lost Hills bunker, initially to journey across the United States to investigate valued technological sites, finally stopping at ATLAS Observatory, in order to discern the fate of the Appalachian group.

After crossing the Rocky Mountains, radio communications were likewise lost between Lost Hills and the Expeditionary Force. Over the course of their months-long expedition, Rahmani and the rest of the First Expeditionary Force encountered a settlement under threat of raiders. Rahmani decided to equip them with government-issue weaponry they had found in a Midwest military bunker. However, the weapons proved useless against the raider force, as the settlement was wiped out, with only two survivors. This incident would set off a division between Rahmani and Shin, with Shin wanting Rahmani to stand trial with the Council of Elders.

However, after Russell Dorsey fortified the ATLAS Observatory, her voice could once again be heard across the region, becoming more audible with each passing week. The loss of communications came from the interference of raiders, preventing the force from messaging back due to the loss of their long-distance transmitter.

By the time they reached Appalachia, taking multiple months, the group itself was made up of only three original Brotherhood personnel. In addition, they had informally recruited many initiates and hopefuls along the way.

Appearances
The Brotherhood First Expeditionary Force appears in Fallout 76, mentioned in The Legendary Run, introduced in the One Wasteland For All update, and expanded upon in Steel Dawn.