For the first time, France tested its own artificial intelligence (AI)-powered battlefield command system in one of NATO’s largest interoperability exercises. The system, which the French Army has dubbed Arcadia, made its debut during the annual Coalition Warrior Interoperability eXploration, eXperimentation, eXamination eXercise (CWIX), held at NATO’s Joint Force Training Centre in Bydgoszcz, Poland. The June 2026 iteration marked the second year that NATO military personnel incorporated an AI-powered system into the three-week exercise.
CWIX brought together Allies to test command and control systems before they are needed in operations. The exercise’s value lies in its practical rhythm, according to NATO’s website: connect systems, identify friction, fix problems, improve the ability of allied forces to operate together. CWIX is one of many ways NATO pursues enhanced interoperability by routinely training, testing and refining joint operations before crisis or conflict occurs. Exercises increasingly focus on emerging and disruptive technologies, including AI. New Alliance initiatives include the Defence Innovation Accelerator for the North Atlantic and the NATO Innovation Fund, the world’s first multisovereign venture capital fund.
Arcadia builds on previous work by the Armed Forces Ministry as part of the Artemis project started in 2022, which uses AI to process massive amounts of defense data. The French Army has been developing use cases for Arcadia internally as well as in cooperation with the industry partners, Gen. Patrick Justel, deputy chief of the French Army staff, said during a media briefing, DefenseNews reported. France worked with several local companies to develop Arcadia, including Mistral AI, Safran.AI, Thales and Airbus.
Arcadia is designed to comply with NATO’s Federated Mission Networking (FMN) standards, Justel told DefenseNews. FMN standards aim to support command and control decision-making in future operations through improved information sharing, providing the agility, flexibility and scalability needed to manage the emerging requirements of any mission environment in future Alliance operations. The French Army tested the system in multiple exercises, including Dacian Fall in Romania and Orion 26 in France, Justel said.
In 2025, NATO acquired a Maven Smart System from Palantir Technologies to serve as its first AI-enabled warfighting system. More than 10 NATO members have integrated Maven into their systems, U.S. Army Col. Arnel David, director of Task Force Maven at Supreme Headquarters Allied Powers Europe, told DefenseNews. Arcadia is vying to serve as either a sovereign European alternative or a vital complement to NATO’s existing Maven system. Ultimately, the capabilities shared between Arcadia and Maven accelerate innovation, forcing a rapid evolution in next-generation defense technologies.
Several European countries have expressed an interest in the Arcadia system as they look for additional options to enhance interoperability and maintain digital sovereignty, Justel said.
Justel argued that Arcadia provides European data sovereignty and tactical edge AI solutions such as field-deployed servers and local mesh networks — for rapid decision-making as opposed to Maven’s centralized cloud model. However, Maven addressed this field-level gap in 2025 by integrating Picogrid Legion. This decentralized, tactical edge software establishes peer-to-peer local mesh networks among field nodes, delivering operational resiliency and accelerated mission command. Both Picogrid Legion and Arcadia fill a necessary gap increasing optionality and better preparing NATO members for potential wartime scenarios.