1. http://www.youtube.com/watch?v=VwvnREVigyo
2. http://www.youtube.com/watch?v=VwvnREVigyo
Given that its been something like 90 years timeline wise since Fallout Tactics. It is safe to say that http://www.youtube.com/watch?v=jYOjl6X-XD0 and http://www.youtube.com/watch?v=hug8-CKheM8 aren't the canon options. Why? Because both endings would have the Midwestern Brotherhood of Steel becoming a super power to rival the NCR or the Legion and they would have greatly expanded in that 90 years or so. They haven't.
Based on Fallout 3's mention of them being in Chicago and the possible mention of them in Fallout New Vegas, which would place them in Colorado. They haven't expanded but still hold onto most if not all the territroy they gained in Fallout Tactics. So this leaves http://www.youtube.com/watch?v=76J4o-7u4VMand Barnaky Endings as options.
I favour the Barnaky Ending because it is the best IMO. It has the great betrayal of the mutants and it creates the Mutant Liberation Army. It would also make the MWBoS into a much more interesting faction. Not that they weren't already interesting, but Barnaky just makes it even better.
My idea as to what happened to the Midwestern Brotherhood of Steel after the end of Fallout Tactics. Based on the
http://www.youtube.com/watch?v=VwvnREVigyo&feature=youtu.be
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Spoiler
Way I see it. The MWBoS fight a bloody war against the Super Mutants and then the Calculator. They force settlements to aid them by giving food, ammo and their best and brightest. Many people do join willingly but the BoS treat them as cannon fodder. The Elders let mutations join because they can be very useful in places humans can't due to radiation.
Vault Zero falls to the BoS and Barnaky becomes one with the Calculator. The BoS are happy to have General Barnaky back. There is a push to make him the head Elder of the MWBoS. The famed warrior (you) who is also a General backs the move to make Barnaky the new head elder, which he does become.
He soon recalls all mutations from the BoS armies and orders them back to their home bases were they are disarmed and tagged, later to be sent to work camps. BoS stops letting mutations join. Laws are passed and any mutation within the BoS' territory is to be rounded up and also sent to camps (work/death camps) which are the start of the great betrayal.
Elders that were most against Barnaky becoming head elder are removed from power. Soon purges happen with in the BoS, anyone that was against Barnaky or seen to aid mutations are also sent to the camps, entire settlement get put to the flame. Soon the Mutant Liberation army forms. BoS caravans and outpost get hit, work camps are liberated, the BoS see a dramatic fall in people willing to join the BoS, and they start having desertions.
Human numbers are replaced more and more by calculator robots and more purges follow fearing an inside job. The BoS stop trying to contact the West in order to get their own house in order.
Biggest blow happens when rouge BoS members set off several bombs within Vault Zero in a failed coup d'état. Many of the calculators systems are damaged beyond repair. Barnaky lives but finds has less control over the robotic forces. He can't control them all at once and the ability to make more robots is severely hampered.
Mutant Liberation Army makes allies with what’s left of the Reaver movement and are supplied with EMP weapons. The remaining slaver/raider groups once again become strong and prey on BoS settlements and outposts.
Decades of bloody Guerrilla warfare against the MLA and the predation of other factions (slavers, raiders) have driven the MWBoS back to their remaining strongholds such as Vault Zero and Cities in between Colorado and Chicago.
Lyons and his BoS are sent out to make contact but don't really know where they are, they know the MWBoS went East, they took a path that takes them away from the MWBoS strongholds at Vault Zero and the others in the Midwest. As Lyons gets closer to DC he hears rumors of people that have similar tech and a symbol are in the area. Lyon spends a long time hunting down those rumors. MWBoS fearing that Lyons is just the tip of a larger army coming up from the south west, do what they can to not be found by them.
Lyons is persistent and soon the MWBoS send out a group of their own elders to make contact. They tell Lyons that MWBoS are just a few hundred men and women close to Chicago. Lyons having made contact goes on to the more important mission of heading to DC.
Like the Barnaky ending states it’s a war the Mutant Liberation Army is distended to lose. MWBoS have seen bitter defeat after bitter defeat for generations and are now a shadow of their glory days but time is on their side. Mutations can't reproduce and the ones that don't fall to the BoS will be taken care of by father time.
Humans, including former BoS that sided with the MLA grow tired of fighting, seeing as how they have crippled the MWBoS and liberated much of their territory. Most just want to settle and farm, the threat is all but gone (so they think). After generations of war, less and less of the younger generations take up the fight.
Maybe the MWBoS will find an ally in Augustus Autumn and his advanced tech can help the MWBoS take back what they lost."
I see for the Midwestern Brotherhood is a decades long war with the Mutant Liberation Army combined with a very paranoid General Barnaky that caused people to turn away from the BoS and ever rebel against the BoS. Along with Slavers, Raiders and Reavers rebuilding their power and causing problems.
The Calculator gets damaged so the Robot Army can't be controlled all at once and new Robots take longer to be built. The Brotherhood is forced back to strongholds across the Midwestern United States.
Midwestern BoS can't produce their own PA so not every member gets one. Only the elite get the best weapons and armour. That is fact.