Detecting Enemy Forces Before Troops Advance Drives U.S. Army Trials of Armed Ground Robotic Scouts.

The U.S. Army is exploring a new approach to ground operations by assigning autonomous vehicles some of the most dangerous missions, including reconnaissance of enemy positions and preparation for precision strikes. At Fort Knox, Kentucky, four robotic vehicles demonstrated their ability to move together, detect targets, and coordinate an attack without continuous human intervention. This approach could allow U.S. units to identify threats and prepare to neutralize them before their soldiers come into direct contact with enemy forces.

Overland AI autonomous ground vehicles participate in a DARPA demonstration at Fort Knox, Kentucky, on October 15, 2026, testing their ability to detect enemy targets and support human-authorized strikes ahead of U.S. ground forces. (Picture source: U.S. DoD)

The purpose of this technology extends beyond automating vehicle movements. The objective is to deploy forward elements capable of surveying an area, employing sensors or attack drones, and transmitting the information needed to authorize an engagement. Commanders could therefore monitor enemy positions and prepare strikes while keeping personnel and crewed vehicles at a distance. This capability addresses challenges encountered on battlefields where surveillance drones and precision-guided munitions make troop movements increasingly dangerous.

According to an article published by the U.S. Army on October 22, 2026, the demonstration took place on October 15 at St. Vith Range under the Defense Advanced Research Projects Agency's (DARPA) Robotic Autonomy in Complex Environments with Resiliency (RACER) program. The experiment responded to a request from U.S. European Command (EUCOM), which is examining how robotic systems could operate beyond forward troop positions to detect opposing forces before American soldiers encounter them.

The vehicles involved were supplied by U.S. company Overland AI. Although their exact model has not been officially identified, their configuration appears consistent with the ULTRA autonomous ground vehicle developed by the company. The ULTRA can reach speeds of 56 km/h, carry a payload of approximately 454 kg, and travel up to 160 km. Equipped with OverDrive autonomous navigation software, it is designed to operate across difficult terrain without relying on GPS or pre-existing maps. Its modular architecture also supports the integration of sensors, drones, and short-range air defense systems.

Related News: U.S. Army Demonstrates ULTRA Autonomous Ground Vehicle in Europe to Highlight Future Tactical Mobility 

The RACER program is not limited to this category of vehicle. DARPA has also tested its technologies on modified Polaris RZR S4 1000 vehicles and heavier tracked vehicles derived from the Textron M5 and adapted by Carnegie Robotics. The latter, designated RACER Heavy Platforms, weigh approximately 12 tonnes. The objective is to develop autonomous navigation software that can be transferred between different vehicle categories, ranging from small reconnaissance vehicles to heavier systems intended to accompany mechanized formations.

At Fort Knox, three of the four vehicles carried drones designed to extend their reconnaissance capabilities or engage targets. Official photographs confirm the integration of one-way attack drones developed by Anduril, although their exact model has not been identified. The company produces the ALTIUS family, which includes intelligence-gathering drones and loitering munitions that can be launched from ground vehicles. The ALTIUS-600M, for example, has a stated range of approximately 160 km and a 4.1 kg warhead, while the ALTIUS-700M can carry a 15 kg payload. These specifications illustrate the capabilities offered by Anduril's drone systems, although there is no confirmation that these particular variants participated in the demonstration.

The scenario began with the identification of a simulated threat using satellite imagery. One vehicle advanced toward the designated area and detected a potential target. It then stopped while two other vehicles moved forward to provide support. A simulated rocket strike subsequently hit a position approximately 274 meters away. The fourth vehicle continued its advance, demonstrating the group's ability to coordinate several movements around a common objective.

One of the central elements of the demonstration was the control of weapons engagement. The vehicles independently handled navigation and target detection, but every decision to fire remained subject to human authorization. Images of detected objects were transmitted to an operator, who determined the appropriate response. This arrangement allows threat detection to be automated without giving machines independent authority to employ lethal force.

For the U.S. Army, this combination could change the initial stages of ground offensives. Groups of robotic vehicles could reconnoiter routes, identify anti-tank positions, and monitor approaches to defended areas before infantry or armored units advance. Their onboard drones would provide additional observation and strike capabilities beyond the line of sight of the ground vehicles. Depending on their configuration, the same vehicles could also transport ammunition, deliver supplies, or assist with casualty evacuation.

DARPA plans another evaluation in December 2026 involving soldiers who will provide feedback on how these systems could be employed. The next step is to determine how these capabilities can be incorporated into ground-unit procedures, particularly in coordinating movements, transmitting information, and authorizing strikes.

This development also has implications for European security. EUCOM's request reflects broader U.S. and allied efforts to examine new approaches to defending NATO's eastern flank, where the war in Ukraine has demonstrated the vulnerability of forces exposed to drones and precision strikes. Groups of autonomous vehicles could form a forward reconnaissance element capable of detecting enemy movements and supporting engagements without immediately committing soldiers. For Washington, the objective is to preserve personnel while maintaining reconnaissance and response capabilities against an adversary equipped with substantial ground forces.

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Written By Erwan Halna du Fretay - Defense Analyst, Army Recognition Group
Erwan Halna du Fretay holds a Master’s degree in International Relations and has experience studying conflicts and global arms transfers. His research interests include security and strategic studies, particularly the dynamics of the defense industry, the evolution of military technologies, and the strategic transformation of armed forces.