Marines and Sailors with the 31st Marine Expeditionary Unit wait by their gear after getting off a ship of Amphibious Squadron 11, April 4. The unit is returning from a deployment, highlighted by multi-lateral training exercise Cobra Gold 2012. The 31st MEU serves as America’s force in readiness for the Asia Pacific Region. - Marines and Sailors with the 31st Marine Expeditionary Unit wait by their gear after getting off a ship of Amphibious Squadron 11, April 4. The unit is returning from a deployment, highlighted by multi-lateral training exercise Cobra Gold 2012. The 31st MEU serves as America’s force in readiness for the Asia Pacific Region.