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Keen Sword 27: Mass Casualty Harbor Event
U.S. Marines and Master Labor Agreement employees with Headquarters and Headquarters Squadron (H&HS), Marine Corps Air Station Iwakuni and Japan Maritime Self-Defense Force members with Fleet Air Wing 31 participate in a simulated mass casualty exercise during Exercise Keen Sword 27 (KS27) at MCAS I
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U.S. Marines and Master Labor Agreement employees with Headquarters and Headquarters Squadron (H&HS), Marine Corps Air Station Iwakuni and Japan Maritime Self-Defense Force members with Fleet Air Wing 31 participate in a simulated mass casualty exercise during Exercise Keen Sword 27 (KS27) at MCAS Iwakuni, Japan, Oct. 25, 2026. Keen Sword is a routine, biennial bilateral field training exercise with multinational participation, designed to increase readiness and interoperability between the U.S. military and Japan Self-Defense Forces while strengthening the ironclad U.S.-Japan Alliance. (U.S. Marine Corps video by Lance Cpl. Jase Graziano)
Attribution: Source: DVIDS Hub — U.S. Department of Defense public-affairs media
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