
Once Elder Maxson took charge following Lyon's death however, the Brotherhood brought some of said dogma.
Renegade Splinter Faction: A heroic example, in that they've chosen to abandon the Brotherhood's dogma of obtaining technology above all else for serving as the protector of the Capital Wasteland. Pragmatic Hero: While they're mostly morally upstanding Paladins, they have a shoot-on-sight policy when dealing with Ghouls, tarnishing their general image. Power Armor: Wouldn't be the Brotherhood without them. Meanwhile, on the other side of the continent, the main branch is all but wiped out after a war with the NCR, most of it forced into hiding. They manage to do all this while carrying out their self-imposed duty of protecting the wasteland population. Furthermore, they've also participated in two major engineering projects (Project Purity and Liberty Prime) and, with the help of the Lone Wanderer, defeated the last major remnant of the Enclave. However, by the end of the game, they've not only recovered vast amounts of advanced Enclave technology just like the original mission intended, but have also developed new pieces of technology like the Tesla Cannon.
Karmic Jackpot: Lyons and his branch were often criticized by the main branch for deviating from their original mission and accepted Brotherhood dogma.Gas Mask Mooks: As usual with the Brotherhood.Fantastic Slurs: "Zombies" for the ghouls and "uglies" and "frankensteins" for the Super Mutants.Elite Mooks: Lyons' Pride, Sarah's personal handpicked squad.Fallout 4 reveals however that following the death of Lyons, the East Coast Brotherhood went back to being much like their brethren in the West Coast while still holding onto some of Lyons ideals.
By the time they are encountered by the Lone Wanderer, their organization is severely understrength and under-supplied.
But they also cut off any reinforcements to the Capital Wasteland. They let him keep his title and status in the order.
This conflict is treated in an interesting way by the Elders of the West Coast headquarters unable to come to a consensus on whether his actions were what their Codex intended, they don't actually punish him. Defector from Decadence: Lyons decided that it was more important to follow the intent of the Brotherhood Codex (use technology to help rebuild society) rather than the letter (acquire technology no matter who gets hurt in the process).