A helicopter flies you over to a nearby outpost, where you are then driven to a small FOB. The lands seem desolate & rotten, with an erie purple glow in some waters...

Advisor radioes over "Good evening, commander. We need you to oversee the establishing of this FOB, since well...there's trouble. Good luck, I'll fill you in on updates, but radio if you need anything."

You disembark, and see a decent mix of soldiers, setting up barricades & defenses. There is also a solitary factory...but it's not decrepit...

(Art credit goes to the amazing Mr P on Twitter. Night one & two are out, the others will be added soon.)