Marine Expeditionary Brigade. A Marine Air Ground Task Force. A principal United States Marine Corps organization that combines air-, land-, and sea-borne forces to conduct a wide array of military operations and humanitarian responses anywhere in the world. Comprised of a CE, ACE, GCE, and LCE. May take the form of a MEB, MEF, or MEU. constructed around a reinforced infantry regiment, a composite Marine aircraft group, and a brigade service support group. Task-organized to meet the requirements of a specific situation. It can function alone, as part of a joint task force, or as the lead A formation of two or more aircraft all lined out to one side and slightly behind the preceding aircraft. of a Marine Expeditionary Force. A MAGTF comprised of a MEF Headquarters Group, Marine Division, MAW, and Marine Logistics Group..