Brotherhood of Steel



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.