ARX Robotics UK's 8 GEREON UGVs survive brutal US desert test in major military exercise

Eight robotic vehicles operated around the clock for six days in the Mojave Desert, with no risk to British soldiers.

ARX Robotics UK, a defense technology company specializing in autonomous ground vehicles, announced the successful completion of Project Convergence Capstone 6 — the U.S. Army's largest experiment in the history of its flagship modernization program. The company deployed eight GEREON uncrewed ground vehicles alongside British troops at the Army's National Training Center at Fort Irwin, California.

The six-day exercise ran from July 20 to July 29, 2026, and was led by the U.S. Army's 4th Infantry Division. Forces from the United States, United Kingdom, Australia, Canada, and New Zealand participated, testing more than 100 emerging battlefield technologies under conditions designed to simulate real combat rather than controlled demonstrations.

First Combined Participation

This marked the first time ARX Robotics UK took part in both the combat validation and experimentation portions of the exercise simultaneously. The company embedded its GEREON vehicles directly with the UK's Experimentation and Trials Group, 11 Brigade, and 3rd Deep Recce Strike Brigade for the full field exercise.

GEREON Vehicle Specifications

The GEREON is a medium-sized uncrewed ground vehicle with the following capabilities:

• Maximum payload: Up to 500 kilograms (1,102 pounds)
• Battery life: Approximately 72 hours before requiring a recharge
• Design: Built to swap between different mission equipment rather than being locked into a single function

Mission Profiles

Throughout the exercise, the vehicles conducted:

• Intelligence, surveillance, and reconnaissance (ISR) missions
• Electronic warfare tasks, including jamming and detecting enemy signals
• Counter-drone operations
• Logistics resupply runs
• Casualty evacuation scenarios

The vehicles remained operational 24 hours a day for the entire six-day period, working directly alongside British soldiers rather than operating as standalone test equipment.

Military Leadership Perspective

Colonel Jim Howard OBE, commander of the British Army's Experimentation and Trials Group, described the exercise as a genuine stress test of the technology outside a controlled environment.

"It is great to see ARX Robotics being put through its paces in one of the world's most demanding training scenarios, both geographically and under highly technology-contested conditions, across mission sets ranging from reconnaissance and counter-UAS to logistics and casualty evacuation," Howard said.

"Project Convergence-Capstone 6 provides a valuable opportunity to test how the British Army integrates autonomous and uncrewed systems into land operations alongside existing networks and capabilities, within a multinational corps-level event. This experimentation is central to delivering the Chief of the General Staff's 20-40-40 vision and understanding how autonomous systems can generate greater mass, reach and operational effect."

The 20-40-40 Vision

The reference to a 20-40-40 vision signals a significant strategic shift within the British Army. General Sir Roly Walker, the Army's most senior officer, has been advancing a restructuring plan that would allocate:

• 20 percent of combat power from traditional heavy platforms like tanks
• 40 percent from reusable autonomous systems (drones and robots capable of surviving repeated missions)
• 40 percent from cheap, expendable one-way systems (such as loitering munitions designed for single use)

Walker has told industry leaders that no crewed platform should deploy in the future without accompanying uncrewed ground vehicles, describing them as the utility vehicle of the 21st century. This philosophy is heavily shaped by lessons from Ukraine's war against Russia, where cheap autonomous systems have repeatedly offset manpower shortages and reduced soldiers' exposure to enemy fire.

Proving Ground Conditions

Fort Irwin's terrain provided a genuine proving ground for the GEREON vehicles. The National Training Center sits in California's Mojave Desert, an environment known among American forces for extreme heat, harsh dust, and rugged terrain that has challenged far more established military equipment over decades.

ARX Robotics UK reported that its vehicles operated successfully at range across those conditions while maintaining connectivity to allied communications and command networks throughout the exercise. Data generated by the GEREON vehicles during the exercise fed directly into brigade, division, and corps-level networks.

Courtesy photos by ARX Robotics