It was an exercise that had it all – robot dogs, an unmanned ground vehicle (UGV) with dual miniguns and a radar system apparently designed to detect drones and an Apache helicopter that took out a small drone in what may have been an unprecedented event.

It was the latest version of the Red Sands exercise that the US and Saudi Arabia have been holding twice a year. The drills were held at the Red Sands Integrated Experimentation Center in Saudi Arabia, a country that is all too familiar with being attacked by unmanned aerial systems – the Saudis have been fighting off drone attacks by the Houthis for several years.

The US is now on the receiving end of Houthi attacks in the Red Sea, with the Shia Islamist group launching drones and cruise and ballistic missiles against Navy ships.

Interestingly, the Pentagon published photos and videos of last month’s Red Sands exercise but didn’t come out with any details of what went on. Still, the visuals provided some clues.

The robot dog was featured prominently. Officially known as the Quadrupedal-Unmanned Ground Vehicle (Q-UGV), it’s shown with a version of the M4A1 automatic rifle which could be used to shoot down small drones.

Last spring, the US Marines tested robot dogs built by Ghost Electronics. The dogs are armed with an artificial intelligence-powered gun system from Onyx Industries. That system uses digital imaging capable of autonomously detecting and tracking humans, drones or vehicles, and reporting targets to a human operator who could be based anywhere around the globe.

The key is that the robot cannot fire the weapon on its own – the human operator remains in control of firing decisions.