DEFENDER is the Army’s largest annual opportunity to exercise moving personnel and equipment into theater across modes for initial and follow-on operations critical to Large Scale Combat Operations. Led by U.S. Army Europe and Africa, the exercise focuses on the strategic deployment of CONUS-based forces, employment of Army Prepositioned Stock and follow-on exercises demonstrating lethality and interoperability with Allies and partners

DEFENDER 25 Outreach tour
DEFENDER 25 Infographic

Videos
Video by Sgt. Christian Tofteroo
Valiant Mark 25: MRF-SEA, SAF conduct physical training
Marine Rotational Force - Southeast Asia
March 27, 2025 | 0:56
U.S. Marines and Sailors with Marine Rotational Force-Southeast Asia, alongside Singapore Guardsmen with 3rd Battalion Singapore Guards, conduct a physical training session during Valiant Mark 25 on Bedok Camp, Singapore, March 18, 2025. Valiant Mark is an annual, bilateral training exercise designed to enhance interoperability, build mutual defense capabilities, and strengthen military-to-military relationships between the U.S. Marine Corps and Singapore Armed Forces. MRF-SEA is a rotational unit derived from elements of I MEF executing a U.S. Marine Corps Forces, Pacific operational model that involves training events and exchanges with partner military subject matter experts, promotes security goals with allied and partner nations, and ensures a persistent I MEF stand-in presence west of the international date line. (U.S. Marine Corps photo by Sgt. Christian Tofteroo)
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    FinlandItalyLatviaLithuaniaNorwaySwedenSlovenia

  • Immediate Response

    AlbaniaBulgariaCroatiaGreeceKosovoMontenegroNorth MacedoniaSlovakia

  • Saber Guardian

    CzechiaGermanyHungaryRomaniaSlovakia

Press Information

enlightenedTo find information about filing a claim related to exercise DEFENDER activities, visit Claims Information and select your country.