The mission of a tank battalion is to conduct operations ashore utilizing maneuver, armor protected firepower and shock action in order to close with and destroy the enemy, as well as provide expertise in anti-tank operations. Currently, tank battalions utilize the M1A1 Abramsmain battle tank and the M88A2Recovery Vehicle.
The mission of an armor unit is to conduct and support amphibious operations and other operations as required by landing and transporting to inland objectives the surface assault elements and their equipment, and by conducting light armored reconnaissance and limited offensive and defensive operations. When task-organized with infantry, tanks, and other forces, the battalion conducts combined arms operations as a separate maneuver element in support of the Marine Division. Currently, Assault Amphibian battalions utilize the Amphibious Assault Vehicle (AAVP-7A1). Although plans were in place to replace it with the Expeditionary Fighting Vehicle, the cancellation of the program is going to prolong use of the AAV. Light Armored Reconnaissance battalions use the LAV 25 series of vehicles. The Combat Assault Battalion is unique in that it combines both vehicles into a single battalion.
Headquarters battalions serve as the command and control nexus for a Marine division or logistics group. They contain the administration, intelligence, operations, planning, logistics, communication, and public affairs control of the division.
Combat logistics battalions (CLB) provide logistics capabilities for the GCE and ACE beyone their own organic capabilities. Each battalion is self-sufficient across the whole spectrum of logistics, including maintenance, supply, etc. Whether deployed or in garrison, the Marines on the front lines trust the combat logistics battalions to keep them and their equipment moving.
Supply battalions provide supply support past that of organic unit supply. They provide all assets that a Marine unit might need, excepting fuels, water, and aviation repair parts provided from the Navy. Rations, repair parts, ammunition, personal equipment, and even entire end items are all provided by or through the supply battalions.
Medical battalions provide medical care beyond the immediate care of unit corpsmen. Often, these units act as field hospitals when on deployment. In garrison, they supplement naval hospitals at various Marine installations.
Dental battalions are responsible for the oral health of Marines and Sailors within the MAGTF. On deployment, they can also be used to support field hospitals per Bureau of Medicine and Surgery Instruction, when not performing dental roles. In garrison, they run dental health clinics at various Marine installations.
The LE battalions will be a force multiplier to the operating forces forward deployed by assisting in an array of missions from law enforcement, route regulation, humanitarian assistance, nonlethal weapons training, and military working dog employment. Marine Corps Bulletin 5400, released in September 2011, called for the reactivation of the 1st, 2nd, 3rd, and 4th Military Police Battalions, now designated as law enforcement battalions, in each Marine Expeditionary Force and Marine Forces Reserve. Three law enforcement battalions were activated in June 2012.
Low Altitude Air Defense Battalions (LAAD) Battalions are tasked with providing ground based air defense in support of the MAGTF. They are also able to be tasked as provisional infantry battalions. They are the only battalion within the Marine Air Wing.