A Marine air-ground task force that is constructed around a reinforced infantry regiment, a composite Marine aircraft group, and a combat logistics regiment. The Marine expeditionary brigade, commanded by a general officer, is task-organized to meet the requirements of a specific situation. It can function as part of a joint task force, as the lead echelon of the Marine expeditionary force, or alone. It varies in size and composition, and is larger than a Marine expeditionary unit but smaller than a Marine expeditionary force. The Marine expeditionary brigade is capable of conducting missions across the full range of military operations.