3rd Battalion 12th Marines

The 3rd Battalion 12th Marines (map designate: MAR 12 || 3/12) was an infantry formation of the UNSC Marine Corps during the Human-Covenant War. This battalion was garrisoned in the central Viery territory of the Human colony of Reach. It was a subordinate battalion under the 12th Marine Regiment during the invasion to counter Covenant Army landing forces.

Internal

 * UNSC Marine Corps
 * Viery order of battle