Step inside VT-4 Hydre tactical vehicle and discover the new digital hub of the French Army.

On the occasion of the Bastille Day rehearsals in France in July 2025, the Army Recognition editorial team met with Sergeant Adrien of the 53rd Signal Regiment, 5th Company. He presented the VT-4 Hydre, an advanced version of the VT-4 light tactical vehicle, designed for network hybridization and interoperability on the battlefield. Its name, inspired by the mythological multi-headed creature, reflects the aim of becoming a multiplier of forces and connections, beyond the traditional role of a command or liaison vehicle. As a mobile digital hub, it is intended to meet the requirements of increasingly connected warfare, with the ability to quickly deploy IT services and secure networks in any operational theater.
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VT-4 Hydre the French Army’s mobile digital hub built for networked warfare and tactical interoperability (Picture source: Army Recognition)

Developed by Arquus under the supervision of the French Directorate General of Armaments, the VT-4 Hydre represents the transition toward network-centric operations. It is gradually replacing the older P4, while providing tactical leaders with a mobile and highly connected command post. This transformation relies on the integration of the Scorpion Combat Information System (SICS), which allows real-time management of the tactical situation and rapid dissemination of information across units. The vehicle is also fitted with new-generation communication systems such as the software-defined CONTACT radio of the Scorpion program, the SITEL information system, and a DAGR satellite geolocation device. Together, these systems make the VT-4 Hydre a tactical network node able to receive, process, and redistribute operational data.

The onboard equipment provides a high level of versatility. It includes the DU PRC Harris, an American long-range radio, as well as the Delta Suit and Attack systems, specifically designed for operations conducted with special forces. The Hydre is also fitted with the CICES system, which displays the real-time position of friendly forces on a digital map. In addition, the vehicle offers Voice over IP (VoIP) telephony, enabled by four SIM cards that allow automatic switching between civilian 4G and 5G networks depending on local coverage.

To secure data flows, the Hydre uses Stormshield, a cybersecurity gateway that protects and segments onboard information systems. For satellite connectivity, it is equipped with a Kymeta antenna linked to the European OneWeb constellation of around 600 to 700 satellites, providing a European alternative to Starlink. At the rear, a second small white dome antenna connected via Transatel ensures continuity of 4G and 5G cellular networks. A network switch also enables wired interconnection between onboard and external systems.

This network hybridization capability makes the VT-4 Hydre a key tool for the French Army. Already in service with the 3rd Signal Regiment, 5th Company, it addresses interoperability requirements with French forces, joint services, and allied partners. As Sergeant Adrien explained, the vehicle “provides flexibility and continuity of digital services in the field, even in contested environments.”

In parallel, the standard VT-4 retains its original specifications: 5.30 meters in length, 2.16 meters in width, and 2.06 meters in height, with an empty weight of 2.66 tons and a payload capacity of 770 kg. Its 220-horsepower engine allows a maximum speed of 165 km/h and a range of 800 kilometers. It can carry five soldiers or four personnel equipped with the FELIN system, and its size is compatible with air transport by the A400M. The vehicle can operate on both military fuels and degraded diesel. Other features include blackout lighting, window protection, and dedicated storage for individual weapons such as the FAMAS or HK416F.

With the VT-4 Hydre, the French Army introduces a new stage in the integration of digital networks into land operations. As a mobile command vehicle and tactical connectivity center, it fits into the Scorpion program and supports preparations for multi-domain and high-intensity operations, where control of information has become as decisive as firepower.