The role of the Master of Ordnance is an unusual one in that unlike many others, it relies on the individual interacting with units outside of his own regiment on a regular basis. After all, most Imperial Guard regiments consist almost entirely of the same general type of sub-units. If an infantry regiment requires artillery support it must obtain it from an artillery regiment, which itself may be positioned many miles behind the front lines. Communication between regiments can be very difficult, and facilitating this communication is the role of the Master of Ordnance.