The war against the machine lifeforms has pretty much ended, but every YoRHa unit 2B worked with and knew are all gone now, A2 9S, the Commander, Operator 6O, unit 21O, even the bunker is all gone because it blew up after many YoRHa units including the Commander got infected with a logic virus, now 2B is trying to live on after all that has happened, after all the horrible things she’s seen and after learning that there were never humans on the moon base, they’ve been extinct this entire time.