First, cheap drones.
Now Fury Bots
The Fury is one of several armed unmanned ground vehicles Ukrainian engineers have developed in the 30 months since Russia widened its war on Ukraine—and one of the first types to see major combat. A Fury has four wheels, a radio for receiving operator commands, video cameras and a remotely-aimed machine gun. It’s thickly built with armor plates protecting its most vulnerable components.
Solution to manpower problems?
I think Germany tried motorcycle robots in WWII but without much success. Theirs were wire guided.
Getting over physical barriers and through mud, moats, walls etc has to be a challenge. And radio communications a limitation. Ukraine uses drones flying above for radio contact. Still vulnerable to jamming.
Cruise missile type guidance based on overhead photos and then short distance AI attack mode might be best. No doubt many are working on improvements.
Remote control explosive delivery system.
Steve