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Video by Lance Cpl. Gage Collins
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H&HS Change of Command Ceremony
Marine Corps Air Station Iwakuni
June 3, 2026 | 2:46
U.S. Marine Corps Lt. Col. Frederico Mendizabal, the former commanding officer of Headquarters and Headquarters Squadron (H&HS) relinquishes command to Lt. Col. Christopher Merrick, the commanding officer of H&HS during a change of command ceremony at Marine Corps Air Station Iwakuni, Japan, June 4, 2026. The change of command ceremony is a Marine Corps tradition which honors the outgoing commanding officer’s effort and dedication while also recognizing the oncoming commanding officer’s commitment to the unit. (U.S. Marine Corps video by Lance Cpl. Gage Collins)
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H&HS Change of Command Ceremony
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189th Infantry Brigade
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Mission & Vision

Mission: 
189th IN BDE (CATB) observes, coaches, and trains our ARNG and USAR partners to provide trained and ready units to support combatant commander requirements around the world. O/O, conduct Mobilization and Large Scale Mobilization Operations (LSMO) in support of our ARNG and USAR partners to meet combatant commander OPLAN requirements.
Vision: 
Our purpose is to support First Army’s mission to achieve FORSCOM directed readiness and deliver trained and ready NG and RC forces. We accomplish this through partnership with the National Guard and US Army Reserve as FORSCOM’s proponent for the integration of the Army’s Total Force Policy (ATFP) and execution of Mobilization Training Centers (MTC) operations as part of the Army’s LSMO effort.

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