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 Spc. Mya Webster
Antwerp RSOM Operations
21st Theater Sustainment Command
March 31, 2025 | 0:47
U.S. Army Captain Denis Porter, assigned to the 21st Theater Sustainment Command, conducts Reception, Staging, Onward Movement, and Integration (RSOM) operations and explains her Military Occupational Specialty (MOS) at the Port of Antwerp, Belgium, on March 11, 2025. These operations ensure efficient and organized movement of personnel, equipment, and supplies into theater, enabling rapid deployment readiness and operational sustainment. RSOM activities like these are critical to mission success, providing commanders with timely and accurate accountability of arriving assets.
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enlightenedTo find information about filing a claim related to exercise DEFENDER activities, visit Claims Information and select your country.