Zone of control

Concept of ZOC. Hex center (0303) When a unit, common to six hexes surrounding a range of ZOC.

In board wargames, zones of control (ZOC) represent the tiles adjacent to tiles occupied by objects. For example, in hexagonal tiled maps, the six hexagons adjacent to the hexagon occupied by a unit could be considered to be in its "zone of control."[1]

Zones of control commonly are used to represent the portion of the map over which a military ground formation has a direct influence, due to the range of its weapons and the distance its sub-units may deploy from its center of gravity.[2] Game rules often include specific effects associated with a zone of control. Typical effects include one or more of the following:

  • Destruction of retreating enemy units.
  • Enemy units must be attacked.
  • Increased movement cost.
  • Interdiction of enemy supply lines.
  • Partly negate enemy zone of control.
  • Prevent further movement, including voluntary advances or retreats.
  • Reveal hidden enemy units.

Zones of Control also represent the indirect effect a formation has on the movement rate of an enemy unit in its vicinity. That is, units deep behind friendly lines, and so outside enemy zones of control, may move almost at road speed under many conditions, while once they approach an enemy unit - and so enter its Zone of Control - their movement rate should slow dramatically, perhaps only to yards per hour, which in game terms is indistinguishable from stopping in the presence of the enemy.

Zones of control come in many forms, including fluid (sometimes called elastic), rigid and locking. Each type is judged by its effect on an enemy unit. For example, a fluid zone of control increases the movement cost of an enemy unit in its grasp (that is, it slows the enemy unit's speed); a rigid zone of control will force enemy units to stop and a locking zone of control will prevent an enemy unit from voluntarily leaving its position without combat.[1] A zone of control may produce almost any combination of effects the game designer wishes.

Depending on what a designer is trying to represent, zones of control may be cancelled by terrain features such as mountains and rivers, by the presence of enemy units, or even by enemy zones of control.

Strategy computer games, such as the Civilization series, commonly use zones of control as a method to balance combat and grant extra strength to units in pairs.

Notes

  1. 1 2 "Gamespeak Glossary". Introduction to War Gaming (PDF). New York: Simulation Publications. 1977. p. 23. Archived from the original (PDF) on 2015-06-10.
  2. ↑ Proctor, Bob (May–June 1982). "A Beginner's Guide to Strategy and Tactics in Eastern Front". Computer Gaming World. Vol. 2 no. 3. p. 10. Retrieved 31 October 2013.
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