181st Infantry Division

The 181st Infantry Division (M-ID 181) is an independent division of the UNSC Marine Corps. Comprised of three brigades, two combat and one support, it works alongside UNSC Navy forces and specializes in deploying into enemy territory.
== Structure and Organization ==
The 181st Division is made up of three brigades. The 14th Brigade is the infantry branch of the 181st, the 6th Brigade is a mechanized and armored unit, and the 3rd Brigade is an air, reserve, and support unit. 
=== 14th Brigade ===
The 18th Infantry Brigade (M-IB 181/14) is the primary infantry brigade of the 181st. With a strength of 5,000 it is the largest unit in the 181st. The 18th is further subdivided into the 8th, 21st and 42nd Battalions.
===== 42nd Battalion =====
The 42nd Rapid Assault Battalion (M-RAB 181/14/42) is a battalion of elite marine infantry assigned to the 14th Brigade. Operating either alone or alongside the rest of 14th Brigade, the 42nd is a rapid-deployment unit that specializes in going through or behind enemy lines. They have gained a reputation for overcoming great odds and defeating superior forces, earning them the nickname "Honey Badgers". 
===== 8th Battalion =====
The 8th Scout Reconnaissance Battalion (M-SRB 181/14/8) is a lightly-armed, fast-moving reconnaissance unit under the 14th Brigade. They often work in tandem with the 42nd Battalion to scout enemy territory ahead of them. The 8th Battalion also contains a number of sniper and marksman units.
=== 6th Brigade ===
The 6th Mechanized Combat Brigade (M-MCB 181/6) is the 181st Division's armored and mechanized component. Charged mainly with supporting the 181st's infantry, the 6th Brigade also deals in armored and mechanized combat.
===== 89th Battalion =====
The 89th Mobile Infantry Battalion (M-MIB 181/6/89) is the 6th Brigade's largest unit. Specializing in mechanized infantry operations, they employ Marine infantry alongside armored personnel carriers like the M650 Mastodon and M88 Bison. 89th Battalion personnel are mostly infantry, with the 92nd Battalion operating and maintaining most of the vehicles. 
===== 92nd Battalion =====
The 92nd Infantry Support Battalion (M-ISB 181/6/92) is the unit charged with operation and maintenance of the vehicles employed by the 89th Battalion's mechanized infantry. The 92nd also possessed a multiple warthogs and a single M312 Elephant.
===== 103rd Battalion =====
The 103rd Marine Armored Battalion (M-MAB 181/6/103) is the 181st Division's main armored unit. Utilizing a variety of tanks and other combat vehicles, their duty is to provide support to infantry units and engage enemy armored forces. Their arsenal includes vehicles like the M810 Vinegaroon, M808 Scorpion, and M400 Kodiak.