U.S. Marine Corps Sgt. Johnathan Berry, right, a chemical biological radiological nuclear responder with Marine Rotational Force-Southeast Asia, I Marine Expeditionary Force, gives a period of instruction to members of the Philippine Marine Corps on the proper use of M8 agent detection paper while at a CBRN subject matter expert exchange during KAMANDAG 7, in Zamboanga, Philippines, Nov. 12, 2023. KAMANDAG is an annual Philippine Marine Corps and U.S. Marine Corps-led exercise aimed at improving readiness, alliances, and mutual capabilities in the advancement of a Free and Open Indo-Pacific. This year marks the seventh iteration of this exercise and includes participants from Japan, the Republic of Korea, and observers from the United Kingdom. MRF-SEA is a Marine Corps Forces Pacific operational model which involves planned exchanges with subject matter experts, promotes security goals with Allies and partners, and positions I MEF forces west of the International Date Line. (U.S. Marine Corps photo Cpl. By Dean Gurule)