If you have a small number of high cost, high impact UAVs, you will target infra and supply columns.
If you happen to have a cargo plane full of cheap, mass produced head-popper slaughterbots which you can dump over a town, they will remove all the humans and leave you with intact buildings, vehicles, and infra. https://www.youtube.com/watch?v=HipTO_7mUOw
"Introduced in 1991, DART had by 1995 offset the monetary equivalent of all funds DARPA had channeled into AI research for the previous 30 years combined"
Thanks for the link - someone at BBN had told me a similar story, but I didn't know the name of the program.
I didn't know about DART. Developed and deployed in eight weeks [edit: less optimistic sources say 23 months]! Is there a good retrospective somehwere with some technical detail?