From 19 to 29 October 2025, ten members of the Eurocorps Staff were deployed to Brunssum to reinforce the Joint Force Command during Exercise STEADFAST DUEL 2025.
As NATO’s largest computer-assisted command post exercise of the year, STEADFAST DUEL 2025 marked the first Article 5 exercise involving all 32 Allied Nations, including NATO’s newest members, Sweden and Finland.
“Participating in NATO exercises is always a highly valuable experience for us,” said OF-3 DYLAN, INFO OPS officer during the exercise. The Eurocorps delegation integrated seamlessly into the exercise, contributing across multiple domains such as conduct of operations, communications and information systems (CIS), intelligence, information operations (INFO OPS), movement planning analysis (MPA), and engineering. “Drawing on Eurocorps’ more than 30 years of operational experience within the NATO environment, our personnel quickly implemented the necessary procedures within their respective area of expertise.”
Directed by NATO’s Joint Warfare Centre in Stavanger and scheduled by Supreme Headquarters Allied Powers Europe, STEADFAST DUEL tested the full suite of NATO’s Deterrence and Defence of the Euro-Atlantic Area (DDA) family of plans. The exercise focused on transforming strategic guidance into coordinated regional defense across land, air, maritime, cyber, and space domains.
At the operational level, STEADFAST DUEL 2025 tested NATO’s strategic and operational command system and the integration of national forces. It brought together sixteen training audiences from both the NATO Command and NATO Force Structure. For the first time, Joint Force Commands Brunssum, Naples, and Norfolk conducted simultaneous training under a continuous, 24-hour battle rhythm, reflecting ACT’s commitment to enhancing realism and multi-domain integration within NATO’s collective training architecture.
While Headquarters Eurocorps remains on alert as the Force Headquarters for the European Battlegroup ([F]HQ EUBG 2025) and is actively preparing for FHQ 2026, its personnel continue to train in NATO processes. In 2026, in parallel with our EU alert responsibilities, we will continue our preparation for NATO certification as a Joint Task Force Headquarters (JTF HQ). These back-to-back commitments stand as a testament to Eurocorps’ well-established duality.