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How many drones is that? More than 500 but less than 1000?    
*According to google, the cost for the average military drone is between half a million to just over a million dollars. The article is very short on information. Not sure why asking a question for perspective's sake is drawing ire.
Kyiv is now seeking to boost domestic production to build what officials cast as an "army of drones."

"Begun, the Drone War has." >

I envision a future hobby of the ultra rich - drone army battles. >

That would honestly be really cool. It would probably be a good way to get them to lay off the actual wars too. >

maybe the drones will have actual aiming mechanisms for the dropped grenades in the next block >

I'm thinking they could at least throw an IR laser pointer aimed down, and IR camera on them.   
I build drones, and that seems like the most easy, lightweight answer I can think of. >

Hello DJI how much C4 can we strap on and still fly? >

At least 1