In all the time I've had the game, I only got the FoTA to help with the new new vegas once.
In the end, always get the followers were overun.
At what point do you get them to help you, so you get their good slide.

I've seen the dialogue, something like, if there was a battle, would you help. But never seen it since the earlier characters.

Does anyone know were and when it is? How do you do it.

Don't do indy or they WILL get overrun. Same thing with CL, but killed or kicked out. Not sure on House and and NCR.