U.S. Marines and Sailors with Marine Rotational Force-Southeast Asia, as a stand-in force, completing their Fiscal Year 2025 deployment and for the first time, completing a full six-month rotation. After compositing in July 2024, MRF-SEA personnel completed exercises and operations in the Philippines, Indonesia, Malaysia, Brunei, Thailand, and Singapore, comprised with elements from I Marine Expeditionary Force such as 15th Marine Expeditionary Unit; 2nd Battalion, 7th Marine Regiment; 1st Light Armored Reconnaissance Battalion; and 1st Battalion, 5th Marine Regiment. 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 video by Sgt. Shaina Jupiter)

U.S. Marines with Combat Logistics Battalion 13, Combat Logistics Regiment 17, 1st Marine Logistics Group, conduct a live-fire, crew-served weapons range during a Field Evaluation Exercise on Marine Corps Base Camp Pendleton, California, April 16, 2025. The FEX reinforced the Marines’ deployment capabilities and unit readiness through the conduct of distributed operations and specific military occupational specialty training. (U.S. Marine Corps video by Cpl. Savannah Norris) This video contains music from a USMC enterprise licensed asset from Adobe Stock

U.S. Marines with 1st Battalion, 5th Marine Regiment, 1st Marine Division, attached to Marine Rotational Force-Southeast Asia, alongside Singapore Guardsmen with 3rd Battalion Singapore Guards, 7th Singapore Infantry Brigade, conduct Valiant Mark 25 at Bedok Camp, Murai Urban Training Facility and SAFTI City Training Facility, Singapore, March 17-26, 2025. SAFTI City, the premier urban training facility in Southeast Asia, is one of the largest and most technologically advanced facilities of its kind in the world. U.S. Marines with MRF-SEA was the first foreign partner force to train at the facility during Valiant Mark 25. 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. Valiant Mark 25 is the 27th iteration of the exercise. (U.S. Marine Corps video by Sgt. Shaina Jupiter)