What is the meaning of combat service support element?

(DoD) The core element of a Marine air-ground task force (MAGTF) that is task-organized to provide the combat service support necessary to accomplish the MAGTF mission. The combat service support element varies in size from a small detachment to one or more force service support groups. It provides supply, maintenance, transportation, general engineering, health services, and a variety of other services to the MAGTF. The combat service support element itself is not a formal command. Also called CSSE. See also aviation combat element; command element; ground combat element; Marine air-ground task force; Marine expeditionary force; Marine expeditionary unit; special purpose Marine air-ground task force; task force.