I've been playing the Fallout series since it was released. I recently started thinking about the Brotherhood of Steel's standing in post-apocalistic America. Something doesn't add up. The Vault is no help in this matter, and appears to have a hole in it's database. I don't want to point fingers at Bethesda, but there's some things they have failed to take into consideration. First off, I remembered that the Brotherhood had a base of operations inside the town of NCR. Here's where things start to come apart. The Brotherhood's main base of operations, Lost Hills, is supposedly inside of the NCR state of Maxson. Yet despite being inside NCR territory, Lost Hills is still under Brotherhood control. All of the details about NCR and the Brotherhood of Steel after this are unconfirmed, as the data was created for the cancelled Van Buren. When Fallout: New Vegas begins, the Mojave Brotherhood of Steel had been at war with the NCR and forced out of Helios One, and had fallen back into the Hidden Valley bunker. According to the loading screens, NCR officials, and McNamara, they were fighting over how technology should be used in the wasteland. What is unknown is whether the NCR is at war against the Mojave Brotherhood of Steel, or the entire Brotherhood of Steel. The Vault states that the war had lasted since before 2274. In Fallout 3, which takes place in 2277, Three Dog states, after the Following in His Footsteps quest, "The Capital Wasteland Brotherhood of Steel defeated a Super Mutant Behemoth outside GNR. That should give the boys at Lost Hills something to think about." If NCR was at war with the Brotherhood in 2277, wouldn't Lost Hills be isolated due to the fact that it's inside an NCR state? There would be no communication between the branchs unless they have some kind of inter-continental communication device. If NCR was only fighting the Mojave branch, wouldn't Lost Hills sent out reinforcements from all of the major bunkers to defend against NCR? The elders wouldn't stand idly by as one of their main branchs was destroyed. They would combine all of the Brotherhood of Steel's forces and wipe out NCR with vertibirds, "invulnerable" power armor (at least according to canon), and advanced energy technology. The official lore states that T-51b is nearly indestructible and was develped to allow soldiers to take on a tank on foot, and win. According to the cancelled data in Van Buren, the hostilities between the two groups started as early as 2231. If they were at war with NCR, they wouldn't send an expedition Washington D.C. in 2254. Also, how could NCR overwhelm the Mojave Brotherhood if their power armor is supposed to be nearly indestructible? The Brotherhood could be attacked by thousands of NCR soldiers, and hold them off with only 20 or so paladins. And when talking to Colonel Moore, she addresses the Mojave branch as the "Brotherhood of Steel" not the "Mojave branch Brotherhood of Steel." That makes it pretty obvious that NCR is supposed to be fighting all of the Brotherhood. The High Elder wouldn't allow one of the Brotherhood's branches to wage war alone. There is many more holes in the story that I can think of, and these are only a few. So in short, according to lore, almost none of the details add up. Feel free to debate this, or correct me if I'm wrong anywhere. I just thought I should seek some answers.