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 Cpl. Keegan Jones
MRF-D 25.3: MV-22B Ospreys depart to Royal Australian Air Force Base Darwin
Marine Rotational Force - Darwin
April 9, 2025 | 2:50
U.S. Marine Corps MV-22B Ospreys assigned to Marine Medium Tiltrotor Squadron 363 (reinforced), Marine Rotational Force – Darwin 25.3, depart to Royal Australian Air Force Base Darwin, Australia, April 7, 2025. MRF-D is an annual six-month rotational deployment to enhance interoperability with the Australian Defence Force and allies and partners and provide a forward-postured crisis response force in the Indo-Pacific. (U.S. Marine Corps video by Cpl. Keegan Jones) 
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Press Information

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