Admittedly, military vehicles are probably too well shielded for this to actually work, but it satisfies a minor fantasy of mine to do something more worthwhile than donating money to Ukraine:
A microwave weapon that can be carried by a drone is powerful enough to shoot down other drones and can also knock out other electronic devices.
The Leonidas Pod, produced by start-up Epirus based in Los Angeles, generates a beam of microwaves to overload a target’s electronics, causing drones to drop out of the sky, but doesn’t affect people.
Other counter-drone microwave weapons are based on magnetrons, the technology found in microwave ovens, and are the size of a shipping container. Instead, Epirus uses compact solid state emitters and last year unveiled a device that can fit on a pickup truck. [NewScientist, 19 February 2022, paywall]
And one need not wipe out all the Russia vehicles, just those at key points in the road. It’s already been demonstrated that four-wheeling across the country-side involves significant risk of getting stuck in the mud.
Here’s Epirus‘ advertising for their HPM. You’ll have to dig about a bit to find it, unfortunately. It’s known as Leonidas and is thought to be effective against drone swarms as well.