Theground combat element(GCE), composed primarily ofinfantryunits (infantry battalions organized into battalion landing teams, regimental combat teams, and Marine divisions). These organizations contain a headquarters unit that provides command and control (management and planning for manpower, intelligence, operations and training, and logistics functions) as well as scout/sniper,aviation liaison/forward air controller,nuclear/biological/chemical defense, communications, service (supply, motor transport, weapons maintenance, and dining facility), and Navy combat medical and chaplain's corps personnel. The GCE also contains combat support units, includingartillery,armor(assault amphibian,andlight armored reconnaissance;the Marine Corps decommissioned theirtankunits in the early 2020s, as part of the service Force Design 2030 initiative which saw it move away from larger armor formations),combat engineer,andreconnaissanceunits. At the division level, the GCE also contains limited organic combat service support, including a truck company, a military police/law enforcement company, and the division band.
As the largest component of the GCE, Marine infantry is essentially multi-purpose, heavily manned and equipped, light infantry (e.g., aMarine rifle squadhaving 13 Marines, vs. nine soldiers in anU.S. Army rifle squad). With threerifle companiesthat are over 40% larger, plus aweapons company,and an additional 100 members in itsHeadquarters and Service Company(as compared to the TO&E of an Army light infantry battalion), theMarine infantry battalioncontains approximately 970 members as compared to approximately 560 in an Army light infantry battalion.
Marine infantry battalions that are reinforced to form aBattalion Landing Team(BLT) are also very heavily supported (as compared to Army light infantry) with additional organic assets. This combat support includes: a field artillery howitzer battery containing a firing platoon of six 155mm howitzers, plus three reinforced armored vehicle platoons (including one each of amphibious assault vehicles, main battle tanks, and light armored reconnaissance vehicles), and one platoon each of infantry reconnaissance and combat engineers.
While primarily trained, organized and equipped to be foot-mobile, Marine infantry is of course, prepared to execute amphibious operations, either byAmphibious Assault Vehicle(AAV-P7-A1),Landing Craft Air Cushion(LCAC),Rigid-Hulled Inflatable Boat(RHIB/RIB),Rigid buoyant boat(RBB), or conventional landing craft such as theLanding Craft Utility(LCU 1466/1610/1627) andLanding Craft Mechanized(LCM-8), etc. In addition, all Marine infantry units are prepared, and regularly train, to perform heliborne, or "vertical envelopment" (i.e., air assault) operations when supported byMV-22medium tiltrotor and/orCH-53heavy helicopters and mechanized operations (when supported by attached amphibious assault vehicle units). Additionally, some Marine infantrymen (usually only those assigned to reconnaissance or special operations units) attend U.S. Army Airborne or Ranger training. However, since the USMC does not maintain either airborne or Ranger infantry units, only a relatively small number of Marines ever attend these two schools.
Furthermore, while not designated as special operations forces, deployedMarine Expeditionary Units(containing a heavily reinforced Marine infantry battalion, consisting of approximately 1,200 Marines and Navy personnel, designated as a BLT) are certified as capable of performing some ""special operations""type missions. In addition to significant differences between Marine infantry and their US Army counterparts in training and organization, there are some differences in individual weapons, equipment, and vehicles, as well.
The Marine Corps conducts infantry training at three locations:
The size of the GCE varies in proportion to the size of the MAGTF. AMarine Expeditionary Forcehas adivision(MARDIV). AMarine Expeditionary Brigadeholds aninfantryregiment,reinforced with equipment and personnel from various divisional combat support regiments (i.e.,artillery) and battalions (e.g.,armor). The variousMarine Expeditionary Unitscommand a reinforced infantrybattalion,which includes various combat support unit attachments. Generally, MEF postings are permanent, while MEBs and MEUs rotate their GCE, ACE, and LCE twice annually.