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 Lance Cpl. Kenneth Twaddell
QUART 25.3: Forged By Sea
15th Marine Expeditionary Unit
June 16, 2025 | 2:39
U.S. Marines assigned to I Marine Expeditionary Force train alongside U.S. Navy Sailors assigned to the amphibious dock landing ship USS Harpers Ferry (LSD 49) during Quarterly Underway Amphibious Readiness Training 25.3 while underway in the Pacific Ocean from May 28 to June 6, 2025. QUART is a joint training exercise involving the integration of multiple units from I Marine Expeditionary Force and U.S. 3rd Fleet to enhance their amphibious warfare skills, enabling the Navy and Marine Corps to prepare for seamless operations in contested and permissive environments. (U.S. Marine Corps Video by Lance Cpl. Kenneth Twaddell)
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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.