years pass and the BoS looks westward...
....
With the 2nd Battle of Hoover Dam decided with the Courier taking Command of the Mojave with Yes Man and all the Securitrons and other Factions backing him, like the Super Mutants from Black Mountain Jacobs town, and other smaller factions and they begin to look eastward for more land due to the west pouring their wealth to the Strip...
....
It has been 50 or so years since Vault 0 was activated and the MidWest BoS stormed the Vault so I have no idea on what condition this side of BoS are in... and one day a group of Humanoid Robots(if they still exist) runs accross a small band of Securitrons scouting the Area looking for natural resources and the two sides finally meet in face to face in lets say... Eastern Wyoming and it turns Hostile.
Who do think would win this Fight between the indy Mojave and the Midwest BoS.