[2019] Fighting the Unidad horde

I haven't had the game long and I was wondering if Unidad ever stops attacking you?

I'm set up in the north part of MOB Condor in Media Luna surrounded by Unidad soldiers and 20-30 destroyed choppers and even more trucks. The vehicle wrecks stop the chopper rockets hitting me and my squad have been picking off the Unidad troops as they get close enough. I have an ammo box in my building and I've been here for an hour or more. Do I have an unlimited kill farm here or will unidad realise "Hey, we've wasted millions of dollars fighting these guys, how about we stop?"