Based out of Okinawa, Japan, the 31st Marine Expeditionary Unit (MEU) is positioned to respond to crisis anywhere in the world.
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CAMP HANSEN, Okinawa – The 31st Marine Expeditionary Unit (MEU) conducted training to prepare the unit for future warfighting capabilities. Immersive, scenario-based evolutions focused on lethality, readiness, and interoperability for an upcoming deployment in the Indo-Pacific Region during a MEU Exercise (MEUEX) in Okinawa, from Apr. 28 to May 9, 2025. Over two weeks of training, MEUEX prepared approximately 2,400 Marines and sailors in strategies and procedures, as well as lethal and nonlethal operations by simulating a wide range of contingencies.
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As midnight approaches through the warship’s red-lit passageways and inside every busy berthing, the familiar anthem “We Ready” by Archie Evermore blares over the ship’s public address system or 1 Main Circuit (1MC). Capt. Tim Carter, commanding officer of the amphibious transport dock ship, USS San Diego (LPD-22), arrests the speaker system right on cue for his address. Meanwhile, choppy seas gift some sailors and Marines with glazed eyes, upset stomachs, and pounding headaches. Thankfully, the sea sickness is only temporary. Carter zealously declares to those onboard that the ship, its crew, and its embarked Marine Corps landing force is indeed ready for whatever may come as they transit the Indo-Pacific.
During the five-day training exercise, Marines operated a SEAB and conducted maritime operations from the island of Ukibaru, Okinawa. A SEAB is comprised of an active radar site and a passive sensor site. The passive site employs communication surveillance to detect and track potential adversary forces by analyzing electromagnetic frequencies and signal activity. Once an object is detected, the passive site will alert the active site to begin scanning, confirming, and identifying the object. When certain frequencies reflected are identified as adversary forces, this data is then communicated to the passive site in the form of targeting data.
ABOARD USS AMERICA – The America Amphibious Ready Group (AMAARG) and 31st Marine Expeditionary Unit (31st MEU) hosted the commanding officers of the 1st, 2nd and 3rd Amphibious Rapid Deployment Regiments of the Japan Ground Self-Defense Force from Feb. 3-6 in a demonstration of the wholesale effort to combine efforts of deterrence in the first island chain.
CAMP HANSEN, Okinawa – U.S. Marines and Sailors with Combat Logistics Battalion (CLB) 31, 31st Marine Expeditionary Unit (MEU), conduct helicopter support team operations with members of the Japan Ground Self-Defense Force (JGSDF) during Iron Fist (IF) 25, at Kin Blue Beach Training Area, Okinawa, Japan, from Feb. 22-23.
WHITE BEACH NAVAL FACILITY, Okinawa – U.S. Marines with the 31st Marine Expeditionary Unit (MEU) embarked aboard ships of the America Amphibious Ready Group (ARG), Jan. 28, campaigning and competing in the Indo-Pacific region.