DEFENDER: A Legacy of Strength and Commitment

 

For five years, the Dynamic Employment of Forces to Europe for Deterrence and Enhanced Readiness (DEFENDER) exercise series has been the cornerstone of the U.S. Army’s commitment to European security. It has proven our ability to rapidly deploy combat-credible forces across the Atlantic, integrate with NATO Allies and partners, and demonstrate the strength of our collective resolve.

DEFENDER was not just an exercise; it was a visible and powerful affirmation of unity, readiness, and deterrence.

 

DEFENDER LogoSword logo

 

From DEFENDER to Sword: A Strategic Transition

DEFENDER accomplished what it set out to do: validate the ability of U.S. forces to deploy rapidly, operate effectively alongside Allies, and deter aggression. It strengthened NATO’s collective defense posture and built trust among partner nations.

The new Sword exercise series shifts the focus of the exercise to in-place forces alongside increasingly lethal Allied land forces assuming more responsibility for the defense of Europe. For U.S. forces, it’s a platform for integrating cutting-edge capabilities, such as AI-enabled command and control systems, and multi-domain operations.

For more information on Sword and related exercises, visit the Sword website.

Building Readiness, Strengthening Alliances (2020-2025)

Launched in 2020, DEFENDER was designed to test and validate the ability of U.S. forces to deploy from bases in the United States to operational areas across Europe. Over the years, it grew into one of the largest and most complex multinational exercises in modern history, showcasing the capabilities of U.S. and Allied forces working together to protect NATO’s Eastern Flank.

Key operational achievements include:

  • Strategic Force Projection: DEFENDER repeatedly demonstrated the ability to deploy thousands of U.S.-based Soldiers and their equipment across Europe with speed and precision, ensuring readiness to respond to any crisis.
  • Command and Control Modernization: The exercise integrated the newly reactivated V Corps into the command structure, enhancing the ability to lead large-scale Allied operations and strengthening NATO’s collective defense posture.
  • Prepositioned Stocks: Drawing on Army Prepositioned Stocks (APS) in Europe, DEFENDER proved the ability to equip forces rapidly, ensuring they were ready to fight upon arrival.
  • Alliance Integration: In 2024, DEFENDER was directly linked to NATO’s Steadfast Defender, the largest Alliance exercise in decades, showcasing seamless U.S. contributions to collective defense and reaffirming the strength of the transatlantic bond.
DEFENDER in a Time of Crisis

The initial DEFENDER in 2020 was executed during the global COVID-19 pandemic, showcasing the resilience and adaptability of U.S. and Allied forces. Despite the challenges posed by the pandemic, the exercise maintained its focus on readiness and interoperability, proving that even in the most difficult circumstances, the mission endures.

 

DEFENDER’s importance was underscored in 2022, when the exercise was conducted against the backdrop of Russia’s invasion of Ukraine. DEFENDER 22 became more than a training event, it was a demonstration of NATO’s unity in the face of aggression. It sent a clear message to European partners and adversaries: The Alliance is unified, capable, and ready to defend every inch of NATO Territory.

 

This real-world context transformed DEFENDER into a critical act of deterrence, highlighting the importance of readiness and the strength of Allied partnerships during one of Europe’s most challenging moments in recent history.

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Video by Sgt. Ronald Bell
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Engineers from the U.S. Army train with Polish firefighters
U.S. Army V Corps
May 29, 2026 | 1:25
U.S. Army Sgt. Deven Batiste, assigned to the 8th Brigade Engineer Battalion, 2nd Armored Brigade Combat Team, 1st Cavalry Division, discusses door breach training with the Bemowo Piskie military fire service at Bemowo Piskie Training Area, Poland, May 28, 2026. U.S. forces in Europe conduct routine training in Poland to enhance interoperability with NATO allies and maintain readiness along the alliance’s eastern flank. (U.S. Army Reserve video by Sgt. Ronald D. Bell)
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