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U.S. Marines with Marine Rotational Force-Southeast Asia, I Marine Expeditionary Force, and Indonesian marines with 10th Marine Infantry Battalion, Indonesian Korps Marinir, stand in formation during the Keris Marine Exercise (MAREX) 2024 Opening Ceremony at Yonif 10 Marinir, Batam, Indonesia, Nov. 6, 2024. Keris MAREX is a bilateral exercise conducted by the U.S. Marine Corps and Korps Marinir Republik Indonesia, or Indonesian Marine Corps, to strengthen relationships as military partners and increase interoperability among participating forces in the advancement of a Free and Open Indo-Pacific. MRF-SEA is a rotational unit derived from elements of I Marine Expeditionary Force 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 presence west of the International Date Line. (U.S. Marine Corps photo by Sgt. Shaina Jupiter) - U.S. Marines with Marine Rotational Force-Southeast Asia, I Marine Expeditionary Force, and Indonesian marines with 10th Marine Infantry Battalion, Indonesian Korps Marinir, stand in formation during the Keris Marine Exercise (MAREX) 2024 Opening Ceremony at Yonif 10 Marinir, Batam, Indonesia, Nov. 6, 2024. Keris MAREX is a bilateral exercise conducted by the U.S. Marine Corps and Korps Marinir Republik Indonesia, or Indonesian Marine Corps, to strengthen relationships as military partners and increase interoperability among participating forces in the advancement of a Free and Open Indo-Pacific. MRF-SEA is a rotational unit derived from elements of I Marine Expeditionary Force 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 presence west of the International Date Line. (U.S. Marine Corps photo by Sgt. Shaina Jupiter)