Drone drops a frag, then thermobaric grenade through the roof of a building where occupiers were hiding

disclaimer: I don't know shit about fuck all

I think small munitions like this are pretty ancient. Something like a bag of flower burst into a room then ignited would have the same effect as other thermobaric weapons - it's a dispersal of fuel into an oxygen rich environment.

They are very useful in confined spaces like buildings and foxholes