ORIGINAL: TheOttoman
I guess it depends on your definition of "mass".
ISIS has been using multiple drones in coordinated attacks for a years now in Iraq and Syria. I've yet to see any actual "swarm" intelligence being used by ISIS, or in this specific attack. One of the main reasons why I think that this *wasn't* a swarm attack was that the Russian infowar unit stationed at the base (which itself points to a specific piece of intelligence) managed to take over only three of the units - which points to a non swarm communication system.
Of course, that was not a swarm. Just coordinated by time and by place multiple drones attack.
ORIGINAL: TheOttoman
Specifically speaking on swarm drones, one only need to look at the releases from China Electronics Technology Group which had an operational swarm of close to 120 units which bested the Navy Perdix and Locust systems in size.
All these are just tests and drills, not a combat employment
ORIGINAL: TheOttoman
Unless you want to bandy around the theory that the US has been responsible for the drone strikes via the P-8 that's been hanging out in Syria?
Logic and Occam's razor require to discard this version. P-8 flied many times long before this attack, so I see no reasons to tie US with this strike. But I don't know about navigation and control systems of drones, about they hardware.