Logistics Combat Element. 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. component comprised of all support units such as communications, combat engineers, motor transport, medical, supply units, and certain specialized groups such as air delivery and landing support teams.