U.S. Marines and Sailors assigned to Marine Rotational Force-Southeast Asia, I Marine Expeditionary Force, concludes its six-month rotation on March 31, 2026. Composited under the 15th Marine Expeditionary Unit, MRF-SEA completed exercises and operations in the Philippines, Brunei, Indonesia and Malaysia. MRF-SEA is a flexible task force that varies in size, capability, and composition, to accomplish different types of missions as a purpose-built unit, maintaining a forward presence and enhancing Marine Corps crisis and contingency response capabilities. MRF-SEA is uniquely organized to support security cooperation and advance mutual security objectives shared with Southeast Asian Allies and partners. (U.S. Marine Corps video by Sgt....
