BRUNSSUM, Netherlands — NATO ended its largest and most complex computer-assisted, command post exercise of the 21st century on Oct. 19.

Exercise Steadfast Jupiter 2023 included more than 7,000 personnel from 17 NATO nations and 24 multinational headquarters exercising every aspect of military operations from the strategic to the tactical levels.

“The future of warfare has become increasingly complex as highlighted by the crisis that is currently occurring on NATO’s eastern flank,” said U.S. Army Lt. Col. Jennifer Gotie, U.S. senior Army officer at the Joint Force Training Centre in Bydgoszcz, Poland, who traveled to Brunssum to serve as an evaluator for the exercise and analyze how to improve multi-domain operations within the NATO force structure. “I have been given the unique opportunity to support the development of NATO multi-domain operations by bringing in over ten years of U.S. Army MDO concepts.”

The defensive exercise was designed to train and evaluate 24 training audiences located at 27 different locations in Europe and North America.

“Steadfast Jupiter 23 is important for U.S. national security because it allows us to maintain a presence with our NATO allies and assist them with the defense of NATO territory within Europe and deter our adversaries,” said U.S. Army Maj. Thomas Artone, Allied Joint Force Command Brunssum, counter-improvised explosive device staff officer. “For the past week in Steadfast Jupiter 23, my section, the counter-IED section within the J3, has been focused on activities to attack the network, defeat the device, and prepare the force as well as counter other hybrid and UAS (unmanned aircraft system) scenarios.”

The exercise was a “milestone in operationalizing the concept for the Deterrence and Defense of the Euro-Atlantic Area (DDA): a strategy for the short to medium term that enables allies to rapidly strengthen NATO’s deterrence and defense posture in all domains,” according to a press release published by NATO’s Allied Command Transformation.

U.S. Army Col. Jason Lojka works as the director of the JFC Brunssum Joint All Domains Operations Center, the nexus for command and control of this four-star NATO headquarters in the heart of central Europe.

“This a Joint All Domain Operations Center (JADOC),” said Lojka, emphasizing joint and all domain. “We are working in all domains, so it’s not just about land, air, and maritime.

“We’re talking cyber; we’re talking space. The idea is that we’re bringing everybody together in one location.

“The JADOC floor provides a tool for collaboration and synchronization across all domains, and it’s not just with, for example, the Army from Estonia, it is all the armies within our current JOA,” he said.

The exercise was based on a simulated Article 5 scenario. Article 5 of the North Atlantic Treaty is NATO’s central precept that an attack against one ally is considered an attack against all allies.

The exercise tested NATO’s responsiveness, command and control, and defense posture in a highly challenging multi-threat environment.

“It’s been a very good exercise to challenge our systems, really test our systems and processes, not only for how we receive information, how we analyze information, and how we distribute information not only to our higher headquarters but also painting the picture to our subordinates,” said Lojka. “This is a great opportunity to help strengthen the alliance and to contribute to our overall security posture in relation to our regional plans and also the road going forward in regard to how the United States approaches security internationally.”

Each of the 24 participating units had specific objectives for Steadfast Jupiter. One of JFC Brunssum’s objectives was to help prepare the unit to take command and control of NATO’s Response Force in 2024.

“With Steadfast Jupiter 23, we tested our proficiency to respond to any possible aggressor threatening the alliance,” said Italian Army Gen. Guglielmo Luigi Miglietta, commanding general of JFC Brunssum. “It was a tiring, yet satisfying experience, and I thank my staff and all the participants for having successfully completed this intensive training, integrated across multiple levels. We have proven that NATO is fit to fulfill its task, which is to defend all members of our alliance.” (Δελτίο Τύπου)

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Post Image- U.S. Army Maj. Aimee Kirk, who works in the G5 section of NATO’s Allied Rapid Reaction Corps headquartered in Croughton, England, briefs Gen. Darryl A. Williams, Allied Land Command and U.S. Army Europe and Africa commanding general during Exercise Steadfast Jupiter 2023 in Romania. (Photo by Staff Sgt. Kyle Larsen)