The 3rd Marine Expeditionary Brigade is a United States Marine Corps unit that is the "middleweight" crises response force of choice in the Pacific Area of Operation. It is the Marine Corps’ only permanently forward-deployed Brigade sized Marine Air-Ground Task Force, is a force in readiness able to deploy rapidly by any and all means and conduct operations across the spectrum from humanitarian assistance and disaster relief to amphibious assault and high intensity combat. 3d MEB maintains a forward presence in the Pacific Theater to support contingencies and alliance relationships. 3d MEB also conducts combined operations and training throughout the region in support of United States national security strategy.