The United States Army has officially introduced the world’s first fully robotic ground system equipped with a high-power microwave (HPM) weapon, designed specifically to counter the rapidly growing threat of enemy drone swarms. The new system, dubbed “Leonidas,” represents a major leap forward in directed energy weapons and provides a critical new defense for ground forces vulnerable to attack from unmanned aerial vehicles (UAVs).
The Leonidas system is a collaboration between two leading U.S. defense firms. It integrates the powerful Leonidas HPM technology, developed by the tech startup Epirus, onto the rugged, hybrid-electric T-REX robotic combat vehicle from General Dynamics Land Systems. The result is a mobile, unmanned, and highly effective counter-drone platform that can be remotely deployed to protect soldiers, convoys, and bases.
Unlike traditional air defense systems that use missiles or bullets to physically shoot down drones one by one, the Leonidas system uses beams of high-power microwave energy. It can emit a powerful electronic pulse capable of overwhelming the systems of multiple drones simultaneously, effectively disabling or destroying an entire swarm in an instant. This offers several key advantages: it has a deep magazine (as it only requires electrical power), a low cost-per-engagement, and provides precise, surgical effects with minimal risk of collateral damage.
During recent field testing, the Leonidas system demonstrated its formidable capabilities by successfully engaging and neutralizing a swarm of 49 small drones in a single engagement, according to program officials.
The development and deployment of such a weapon has been an urgent priority for the Pentagon. The war in Ukraine and other recent conflicts have proven that cheap, easily produced drones, especially when used in coordinated swarms, can overwhelm even the most advanced conventional air defenses and pose a lethal threat to tanks, artillery, and infantry. The recent “hybrid warfare” drone campaign that has plagued European allies has further underscored the need for an effective counter-UAV solution.
The Leonidas robotic system is designed to be that solution. As a mobile, unmanned platform, it can be sent to the most dangerous parts of the battlefield to create a protective electronic shield over friendly forces, allowing soldiers to focus on their primary mission without the constant threat from above.
