Isn't the Midwest bos only semi-canon?. There still a chance that some of the outpost could still be inhabited.
From what we know about the MWBoS from Fallout 3, NV, and 4
-The BoS sent some guys east in airships.
-Those airships crashed in the Midwest.
-The BoS who survived set up a base in Chicago.
-They fought super mutants.
-Some of those super mutants were absorbed into the MWBoS's ranks.
-By the time of New Vegas, they seem to still be stretched from Chicago all the way too Colorado, as Caesar mentions capturing BoS scribes out east who don't know the name of Maxson, and the only BoS known to be operating in the Legion's eastern areas(which would be near Denver) is the MWBoS. Them not knowing of Maxson would make sense given their large outside conscription, and their general dislike of the Western BoS.
-Miscellaneous bits from Tactics, such as Nuka Cherry, and giant roaches, are still considered canon. Though giant roaches have been renamed radroaches.
While not specifically stated, we can reasonably guess the Barnaky ending isn't canon, as nowhere in New Vegas do they mention the Mutant Liberation Army being pushed back into the region as happens in that ending.
We can also assume the Calculator was destroyed, as part of Lyon's mission east was to make contact with the MwBoS, and bring them back under Lost Hill's command. And neither Lyons nor Rothchild mention a giant robot army. Rothchild even mentions the MWBoS are a small group. Caesar also fails to mention a giant robot army accompanying the BoS he captured.
We also know they haven't expanded east or west of the territory they captured in Tactics. If they had, they would be in Ashur's territory by the time The Pitt starts, yet no one there mentions them. And Caesar doesn't mention any significant MWBoS force, which would be present had they expanded west after the ending of Tactics.
And here it is:
