Yeah, but the OP"s original statement was that patches of humans have survived the ZA but the military is decimated, and the OP seems to think that it's not plausible (or something).
The military are in the service of the US government..
There is no US government.
It simply does not exist.
I'd have to believe that with all the resources to protect members of congress and the POTUS, that perhaps there is a chance that some leaders have survived and are sheltered away in an underground bunker with years worth of potable water and food. A nuclear bunker.
But then again, just one person dies, and turns, and all bets are off. That's one of the things I expected to happen at the prison. Someone dies unexpectedly in the night. I would have slept every night with the cell door locked. For my protection and everybody else's. But I digress...
I have to believe at some point, that society gets a hold on this. They figure out ways to manage walkers. Corral them en masse into a big pen somewhere in the open and drop a daisy-cutter right on top of them. Remember how the herd that ran through Hershel's farm was originally following a helicopter? Take choppers, play some goddamn Nickelback (because only brain-dead zombies like that shit) through some bullhorn speakers, right out into an open field, and drop a damn MOAB right on top of their sorry asses. Yeah. Fuck yeah.