Brotherhood of Steel



"The Brotherhood of Steel is born out from the ashes of old America after the Great War in the Fallout universe since I did play that game series before when I was just a young man and way before World War III did happen. Now that they're here, they knew that the Combine Empire is here to invade and occupy North America. That's funny... how can a post-apocalyptic faction be founded in a pre-apocalyptic world like this?"

--Su Ji-Hoon, The Steel of Brothers

The Brotherhood of Steel is a quasi-religious technological military order operating across the ruins of post-war North America, with its roots stemming from the United States Armed Forces and the government-sponsored scientific community from before the Great War.

In When the Cold Breeze Blows Away, the Brotherhood of Steel is founded earlier following the Combine's invasion and occupation of North America, then Brotherhood has sense to became one of those major factions on Earth that fights the Combines and to have joined the Grand Alliance to fight the occupying Coalition of the Red Star.