As integrated air support for a squad or platoon, it would work. Send it out to scout for the enemy, engage whoever it finds, then fly back to the platoon for resupply.
I could also see outfitting an armored unit with a few. It sits on top of a charging station on the vehicle, and gets sent out to check for IEDs and anti tank missile units, engaging whatever it finds.
Possibly if the military versions are much quieter than those available to the public.
As much noise as the civilian drone make they are not going to sneak up on the enemy and resent news reports of drones being shot down when becoming intrusive shows they are vulnerable to shotgun fire.
I can only see the drones today as being sacrificial use and forget tools in combat. If you manage to get it back great but typically one use only devises. Buy them in bulk and hope for the best.