The Army armed UGVs with rifles. In the past, the Army used the ground robots to defuse IEDs, scout buildings and sort through rubble. It was only a matter of time until someone figured out how to mount a weapon on them and use them for combat missions. These are literally remote controlled M249 SAWs.

The Air Force went through a similar transition with the Predator UAVs. At first, they were a simple recon drone designed to supplement air operations. Then they armed them with Hellfires. The newest UAVs like the Reaper virtually replace fighter-bombers.