Chris Kemp’s Not Quite Mechanised
ORDER OF BATTLE
Units are either TEETH ARM (Armour, Infantry, Cavalry), SUPPORTING ARM (Air, Artillery, Anti-Air, Anti-tank, Engineer) or LOGISTIC (Transport, Logistic, Maintenance, Medical, Provost).
The Order of Battle (Orbat) must state if supporting and logistic units are UNDER COMMAND, IN DIRECT SUPPORT, or IN SUPPORT, of teeth arm units.
UNDER COMMAND: The supporting unit is commanded and receives its ammo resupply from the commanding unit. No other unit has a call on the supporting unit.
IN DIRECT SUPPORT: This term usually applies to artillery. The supporting unit is allocated exclusively to the supported unit, and experiences no command reaction delay when bringing down fire – it comes in the hour that it is asked for, and immediately on pre-registered targets. The supporting unit may only support other units by order of its own superior HQ. In practice this means divisional HQ for divisional artillery. The supporting unit receives its ammunition from its own chain of supply, not that of the unit that it is supporting.
IN SUPPORT: The supporting unit is allocated to one or more units, and comes in the hour after the one it is asked for. All units that are allocated units in support have equal call on them. The supporting unit administers itself, as per units in direct support.
Written orders at the start of the Operation must cover Aim and Objectives. Use Command Reaction Time (CRT) when reacting to unexpected events, e.g. reinforcing, or changing axis of attack, or when releasing units with no supporting orders to act in support of subunits for attacks. See Command Reaction Table 5.
Orders must detail Command Structure, Allocation of Support and Logistic units, Location of HQs, Timings. Changes to plan must suffer Command reaction Time – See the Command Reaction Table 5. Often a well-drawn map with annotations will cover all that is needed