Perhaps, you didn’t realize it but most nations have signed a treaty to prohibit gas-air weapons on the battlefield. Seems like hell on Earth, you say? Yes, that is a fantastic way to explain it, and you certainly would not want to be on the losing end of that game. Incidentally the United States didn’t sign the treaty.
Why you ask, well, we are the inventors of Napalm, and the more modern versions of gas-air weapons, which are even more deadly than ever before, also more accurate, truly scary stuff, and if the 1000-degree plus fire doesn’t kill you, all of the oxygen is sucked into the fire so that you suffocate, either way you have no escape. Even countries refusing to sign the chemical weapons ban sign were more worried about gas-air weapons in the skies.
Nowadays, we could easily deliver those deadly munitions from UAV (unmanned aerial vehicle) or drone. Again, scary stuff, but let me tell you of an even scarier potential invention for robotically dropped gas-air weapons using swarms of UAVs constantly refueling the weapon pods using aerial refueling and unleashing this hell for hours and hours until there are no enemy infantry everywhere.
To begin with, I suggest using a pod of polymer balls that expand when filled to 2,000 times their initial size. They’ll be full of a liquid fuel-explosive mix, and the polymer balls un-expanded will sit within the pod and after the gas enters the chamber”x-amount” of chunks will be discharged and like a membrane sponge soak up the fuel until the inside cavity of the pod is filled up. The liquid-fuel explosive will be transferred into a reservoir in the UAV, the UAV will then search and strike accordingly within a swarm of 100s of other UAVs.
Once depleted of polymer balls and fuel the UAV will fly back up into the suitable elevation and match up with the airborne re-fueler and repeat as long as necessary, possibly days? Yes, I do have drawings, drawings and schematics and if you’ve got a security clearance, then come look me up. No one wants or enjoys war, but if you find yourself in one, you must acquire, and decisively. Please think about all this and think on it.