When I read this report by Ben Coxworth at New Atlas:
Instead of going to the time and trouble of designing and building tiny robots from scratch, some scientists are now turning existing insects into remote-control cyborgs. A new “assembly line” could help, by converting cockroaches into cyborgs far faster than can be done by hand.
Putting it simply, cyborg insects typically consist of a large-ish insect – often a Madagascar hissing cockroach – that has been equipped with a small electronic backpack. Remotely controlled electrodes in that backpack stimulate body parts such as the insect’s antennae or eyes, causing it to start and stop walking, and turn left or right.
My immediate reaction to this was now imagine millions of these things on a battlefield.