From The Darker Side of AI

AI can't all be sunshine and roses, can it? Not to be outdone by the Chinese, the US Marines have begun training their own army of armed robot dogs. One can only imagine the disappointment in land-based military units given that the Air Force have had lethal bird-like robots for over a decade, and the navy has been successfully using fish-like deadly drones for a while too. The development of rifle-armed robot dog packs will surely bring the system back to parity.

Though not technically AI yet (these robots currently require a human handler), it's not a big step to imagine a world where we are being herded around by a system of autonomous UGVs (unmanned ground vehicles). This may be a growth area of the military that bears some scrutiny and oversight.