U.S. Marines with 1st Battalion, 5th Marine Regiment, 1st Marine Division attached to Marine Rotational Force-Southeast Asia, and the Singapore Guardsmen with 3rd Battalion Singapore Guards, 7th Singapore Infantry Brigade, demonstrate military operations in urban terrain and conduct a blank-fire raid rehearsal during Valiant Mark 25 at Murai Urban Training Facility, Singapore, March 19, 2025. 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...