USAREUR-AF, NATO Allies conclude Exercise Avenger Triad 26

WIESBADEN, Germany - U.S. Army Europe and Africa and NATO Allies successfully concluded Avenger Triad 26 on Oct. 15, marking the end of a 10-day, distributed command post exercise that tested simulated large-scale, multi-domain combat operations across Europe.

Conducted from Oct. 6 to 15, the exercise brought together approximately 2,000 U.S. service members and 2,000 multinational personnel operating from command posts across France, Germany, the Netherlands and Poland. Avenger Triad 26 was synchronized with NATO's premier command post exercise, Steadfast Duel 26, which linked strategic and operational decision-makers across all 32 Allied nations.

Operating primarily from the Combined Operations and Intelligence Center at Clay Kaserne in Wiesbaden, USAREUR-AF and NATO's Allied Land Command functioned as a converged, integrated warfighting headquarters, turning NATO's regional defense plans into synchronized operational action.

"Steadfast Duel and Avenger Triad demonstrated that our collective defense is not just an idea on paper; it is an active, trained reality," said Lt. Gen. Jez Bennett, acting LANDCOM commander. "By deploying our LANDCOM staff to Wiesbaden to fight alongside our U.S. partners as a single, connected headquarters, we tested our people, validated our processes and refined our ability to deliver decisive action under pressure. Our strength lies in interoperability, and this exercise proved our readiness to defend every inch of Allied territory."

Avenger Triad 26 placed headquarters staffs under continuous operational strain, simulating combat conditions against a simulated opposing force in a complex, multi-domain environment. Participating Allied corps included the U.S. Army's V Corps, the 2nd Polish Corps, the 1st French Corps and the 1st German-Netherlands Corps, supported by specialized theater commands including the 21st Theater Sustainment Command, 10th Army Air and Missile Defense Command and Multi-Domain Command - Europe.

A central objective of the exercise was putting concepts from NATO's Eastern Flank Deterrence Initiative into operational practice. Rather than relying solely on static lines of defense, EFDI integrates advanced sensors, unmanned aerial systems, cloud computing and shared data environments to shorten the time between threat detection and target engagement.

Command posts utilized next-generation command-and-control software, including the Maven Smart System, to establish a unified common operating picture across dispersed national headquarters. This common data backbone enabled military planners to process vast amounts of operational data, accelerate commander decision cycles and coordinate deep fires across the land, air, sea, cyber and space domains.

"What we accomplished in Wiesbaden was a real test of how we will fight if called upon," said Brig. Gen. Thomas Lowin, LANDCOM deputy chief of staff for operations. "Operating as one team, we proved that we can connect distributed sensors to effectors through a resilient digital backbone. While artificial intelligence and modern data tools help us cut through noise and deliver information rapidly, warfare remains fundamentally human. Our staff analyzed those options and gave our commander the clarity required to act decisively."

Lowin noted that the progress made during this year's exercise built directly on lessons identified in previous iterations, moving NATO's operational transformation from concept to frontline execution.

"Last year we finished at a high level, and this year we started at that level," Lowin said. "The credibility of our deterrence rests on our capability. When an adversary sees that 32 nations can share data seamlessly, command corps-level formations across thousands of kilometers and coordinate joint fires in minutes, it sends an unmistakable signal: attacking NATO will not succeed."

Avenger Triad 26 and Steadfast Duel 26 also underscored European Allies taking on greater operational responsibility for theater defense, ensuring that national and multinational corps can seamlessly integrate into NATO's overarching command structure during an Article 5 collective defense scenario.

The operational insights and digital workflows refined during Avenger Triad 26 will inform planning for upcoming theater maneuvers, including NATO's large-scale field exercise Steadfast Defender 2027, where these command post concepts will be tested with live formations in the field.