The M1 armor crewman leads, supervises, or serves as a member of M1 armor unit in offensive and defensive combat operations. In addition, serves or assists on staffs at battalion or higher level.

Military police supervise or provide support to the battle field by conducting maneuver and mobility support (MMS), area security, internment resettlement operations, police intelligence operations, prisoner of war operations, civilian internee operations, law and order operations on the battlefield and support to the peacetime Army community through security of critical Army resources, crime prevention programs and preservation of law and order.

The riflemen employ the M16A2 service rifle, the M203 grenade launcher and the squad automatic weapon (SAW). Riflemen are the primary scouts, assault troops, and close combat forces available to the MAGTF. They are the foundation of the Marine infantry organization, and as such are the nucleus of the fire team in the rifle squad, the scout team in the LAR squad, scout-snipers in the infantry battalion, and reconnaissance or assault team in the reconnaissance units. Noncommissioned officers are assigned as fire team leaders, scout team leaders, rifle squad leaders, or rifle platoon guides.

The machine gunner is responsible for the tactical employment of the 7.62mm medium machine-gun, the 50 cal. and 40mm heavy machine-gun, and their support vehicle. Machine gunners provide direct fire in support of the rifle and LAR squads/platoons/companies and the infantry and LAR battalions. They are located in the weapons platoons of the rifle and LAR companies and the weapons company of the infantry battalion. Noncommissioned officers are assigned as team leaders and squad leaders/section leaders.