Brotherhood of Steel
Not much is known about this faction.
Their Badge was found on a pauldron from a power armor, which was worn by a Super Mutant coming out of the forest of Cypress Creek.
While they are not known to operate in the Suburban Wasteland any longer, The Brotherhood has had a lasting impact on the local landscape. 80 years ago their battles with Gammorin’s Army spilled over into the Menuxette River Valley, leaving much of it’s previously intact structures in ruins.