A CH-46 helicopter of Marine Medium Helicopter Squadron 265 (Reinforced), 31st MEU, arrives with Marines and Sailors with Combat Logistics Battalion 31, 31st MEU, at the scene of a mass casualty exercise. The training was held in preparation for the 31st MEU’s certification for deployment. The 31st MEU is the only continually forward deployed MEU and is the nation’s expeditionary force in readiness in the Asia-Pacific region. - A CH-46 helicopter of Marine Medium Helicopter Squadron 265 (Reinforced), 31st MEU, arrives with Marines and Sailors with Combat Logistics Battalion 31, 31st MEU, at the scene of a mass casualty exercise. The training was held in preparation for the 31st MEU’s certification for deployment. The 31st MEU is the only continually forward deployed MEU and is the nation’s expeditionary force in readiness in the Asia-Pacific region.