Lost Hills was main hub of operations for BoS and really nobody knew about it.
Man, EVERYONE knew about Lost Hills.
Just look at Hub caravans, which were heading there, or just look at dialogues about BoS, Lost Hills wasn't secret. EVEN TOWN WAS BUILT ABOVE LOST HILL, to have protection from BoS
The most funny fact, you're using arguments without references! Man, if you want to prove something, give some evidences FROM GAMES, not "maybe it's like this, or like this". Really? Discussion can't happen like this, especially while you spreading a lot of false facts, like this one about Lost Hills... basically, I gave facts about mid BoS dying, and you're only arguments are "MAYBE NO?". Bullshit.
I don`t know, maybe from the wrackage of crashed Zeppelins?
Wreckage of Zeppelin is some kind of mountain, seen from every part of America?
To see zeppelin, they must be close to it, like tens of meter, and same thing apply for Vault 0...
Also, some zeppelin crashed at Osceolla, but they still talking only about Chicago, because it's place where they met mid BoS, which was SMALL.
And where did I said it is rulling whole regions?
You said it can rule more than Chicago, there is 0 evidences for it.
Cool, maybe it`s true. Or they are hidding cause Legion is massive threat and they haven`t recovered from wounds after war against machines.
FAR EAST What is there hard to understand? And no, you can't hide:
" the central hub of operations, coordinating between outposts far and near and reinforcing their supply lines and transport routes across the countryside."
Especially to great Legion's scouts like Twisted Hairs for example.
The fact is they are alive and due to different politics then original BoS they still have potential to grow big.
Faction, which was once powerfull and now is just loosing and dying haven't potential to grow big again... (unless like Enclave from FO3 or BoS from FO3, but we are not taking insane Bethesda style plots into account.)