The MDO could be described as a, fast, moving watchtower, usually deployed around New Moscow defensive perimeter. It may also be used to provide defense for ERA advanced bases against enemy forces, be they asian-american mercenaries or the Shadow-Walkers. The MDO is composed of a heavy duty Scorpion truck, one of the most versatile ERA vehicles, equiped with a 50cal. autocannon that can be deplyed to function as an independent turret to defent some strategic spot. The other part is the trailer, that is in fact a modern, fully automated multi-purpose gauss-cannon, mainly used as an anti-armor and anti-aircraft gun. The black and white colors at the front of the truck are the colors of a Ground Commander.