U.S. Marine Corps Cpl. Angel Perez, a machine gun team leader with 1st Battalion, 5th Marine Regiment, 1st Marine Division, attached to Marine Rotational Force-Southeast Asia, coaches a Singapore Guardsman with 3rd Battalion Singapore Guards, 7th Singapore Infantry Brigade during a weapons familiarization live-fire range as part of Valiant Mark 25 at Pasir Laba Camp, Singapore, March 21, 2025. During the range, U.S. Marines and Singapore Guardsmen familiarized themselves with partner nation’s weapons systems. 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. (U.S. Marine Corps photo by Sgt. Shaina Jupiter)