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 (See Close Escort.), Aviation Combat Element. A MAGTF component that contributes the force. Includes all aircraft (fixed- and rotary-wing), their pilots and maintenance personnel, and those units necessary for aviation command and control., Ground Combat Element. A MAGTF component usually comprised of infantry and supported by armor (tanks), and artillery. May also include special units such as scouts or Force Reconnaissance, snipers and JTACs., and Logistics Combat Element. A MAGTF 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.. May take the form of a Marine Expeditionary Brigade. A MAGTF 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 echelon of a MEF., Marine Expeditionary Force. A MAGTF comprised of a MEF Headquarters Group, Marine Division, MAW, and Marine Logistics Group., or Marine Expeditionary Unit. The smallest type of MAGTF with customizable composition based on the task at hand. Additional artillery, armor, or air units can be attached, including squadrons of MV-22B Osprey and AV-8B Harriers..