[quote=@FalloutJack]
[@Auz] I have kind of a dumb question: Didn't the Legion originally come from the East?  Maybe more Central, but wasn't the point of Ulysses and the Courier that they were mailmen from the West and East?  You could have it that the Legion went back East to reconnct/regroup with territories it was more familiar with.
[/quote]

They came from Arizona I believe. They're just called the East in NV because they're to the East of Hoover Dam. Depending on where you stand lore wise, the Midwestern BOS was/is supposedly occupying most of the territory in the centre of America.

Would love to bring the Legion east, maybe remnants but I think it might be a bit of a stretch.