I didn't mean they're literal survivalist/NWO types, but just referring to the dystopian nature of the cop and her speech and what looks to be that whole arc. I'd say they managed to hoard some supplies at first, but when that ran out, they were at a loss. They possibly sought other groups for alliances or aid, possibly in exchange for security. My guess one of those groups was the people at Terminus.
There are speculations the cops were the former security/militia at Terminus, but there was some sort of revolt and the cops split off from Terminus.
Yes, they're different. The girl on the gurney is black (and about to lose an arm), the girl biting out the throat of the cop on the floor is white. The white walker girl biting out the cop's throat also has both arms.
According to the trailer, they do seem to ally with Rick's group, at least believing Rick's group has the cure. Presumably Gareth is talking to Rick there re: going to Washington c/o Bob's pleading for their lives and the reveal they have the cure. If it proves the cops are an enemy of Terminus, we could get an enemy-of-my-enemy-is-my-friend scenario between Rick's group and the Termites.
There was a rumor that train car A was for arrivals and train car D (possibly where the screaming was coming from) was for departures.
My impression was the cops were running the place as security and, in theory, just as they did at Terminus. Some last ditch hold-out attempt in the end of the world, they just took a very Orwellian approach to it. Right now I'm leaning more towards all the young persons in scrubs (most seem in their 20s to older teens) are just to bolster their ranks to fulfill multiple positions in the hospital and, possibly, persons that would make the most optimal offspring for the survival of the human race (in this case, young, healthy people). Also, in theory, any persons they could turn into a meal (which would probably be the weak or injured among the group).
I'd hate to put it in these terms, but when I first read those filming spoiler reports about Carol hit hard by a car and her stunt double looking really rough? Then the cops collect her, put her in the back of their station wagon? All I could think was, "It sounds like they just picked up roadkill."
There would be a real irony in these cops with their prim, stern Orwellian "system" turned out they were the actual cannibals all the while. For all the lady cop's starkly neat appearance for the ZA (compare to how anyone in the prison looked in the quiet times, cop lady's appearance is almost obsessively, shockingly tidy), in reality, she and her ilk devolved into an unthinkable kind of savagery to survive. If they had been part of Terminus not long ago, maybe they were the cannibals and, despite how the Termites treat Rick's group in the trailer (literally invoking images of cattle lined up for slaughter and undoubtedly very purposefully so), is nothing but pure theatrics from the Termites to scare Rick's group into submission. In theory, it could have been how the cops had treated the Terminus people before any revolt?
IMO, Gareth seems to acquiesce almost a little too quickly to the possibility of a cure, something he couldn't possibly be certain was anything but pure bullshit on Eugene's end to save their skins unless he had some considerable knowledge in medical sciences, and cooperatively willing to travel to Washington with Rick's group to deliver that cure and save the human race. It might suggest someone who might not be all bad or wasn't all bad once.
While, on the other hand, we have this super-prim lady cop who smacks Beth Greene, who spent most of her time in the series thusfar singing & taking care of Judith and couldn't be more than a buck and a quarter soaking wet, across the face with the butt of her pistol. A really extreme reaction. Maybe Beth, staring cop lady down defiantly, really did screw up something major for cop lady somehow, but that still seems an extreme reaction to me. It suggests to me there's a lot going on under the surface of that prim & proper cop appearance and it isn't pleasant stuff.
I suppose I haven't taken it out of the realm of possibility yet the scariness of the Terminus stuff may be misdirection or red herrings. The true horror, the real Heart of Darkness, of s5 or at least 5A may lie in the Orwellian dystopia hospital. it's been eluded by both Kirkman and Gimple Terminus aren't the actual (or main) bad guys of S5, but that it may even be Rick's group the aggressors here.