Concept

Zone of control

You might say: ZOC, ZoC, control zone, area of influence

A zone of control (ZoC) is the area around a unit or position where its presence changes how opponents may move, pass, disengage or resolve contact.

What it does

Turns contact into spatial pressure: screening and line holding, stopping infiltration, making flanks matter, and adding friction to movement through threatened space.

Ask

What does this presence control, when is the zone checked, and what lets an opponent enter, cross or leave it?

Typical

entry stop; semi-rigid crossing restriction; fluid or elastic cost; locking; staged WEGO; opt-in projection; no universal ZoC; destination standoff

Trouble

A cheap screen freezes a larger force; a lock removes disengagement; an unshown tax makes route planning wrong; simultaneous turns leave unclear whose position counts.

What to look for

1. A translucent ring or highlighted adjacent cells around a unit
2. A route overlay changes colour or shows a movement-cost number at contact
3. A lock, blocked arrow or attack marker on a departure or crossing
4. A replay or impulse report showing when contact changed

Catalogue: ZoC model

• Rigid (entry stop): Civilization VI and many hex wargames stop a unit's remaining movement when it enters an enemy zone. The defining feature is the entry stop; a visible ring, hex grid or cavalry exception is not what makes a model rigid.
• Semi-rigid: CAOS lets units enter and leave enemy zones but forbids moving directly from one enemy Zone of Control hex to another. Semi-rigid is the crossing exception, not merely a smaller movement tax or a softer-coloured overlay.
• Fluid or elastic: WEGO WW2: Stalingrad adds a movement cost for entering an enemy zone while leaving remains possible. The defining feature is a movement cost or penalty rather than a hard stop; the overlay colour is not the rule.
• Locking: Old World and Battle Brothers use contact that can prevent ordinary departure, keeping units engaged until a release or successful escape. Locking controls departure; it is stronger than making entry costly and is not defined by a melee setting or one-tile radius.
• Impulse or slice resolution in WEGO: CAOS resolves simultaneous movement and combat in numbered impulses; WEGO World War II: Overlord repeats a movement check every slice as enemy positions change. This model answers when the zone is checked; it is a resolution schedule, not by itself a rigid or fluid movement effect.
• Opt-in stance or trait: Battle Brothers makes stronger projection opt-in through an enabled Spearwall skill; Old World gives cavalry and some unique units a trait that can ignore ZOC. The defining projection is an enabled skill; the Old World exception shows that a unit trait can alter control.
• No universal ZoC: telegraphing and body blocking: The cited pages show alternative information and resolution tools: Into the Breach telegraphs attacks; Atlas Reactor gives frontline tanks a body-blocking role; Frozen Synapse executes both turns simultaneously; Advance Wars highlights a unit's movement range. The presence or absence of a conventional ZoC is unverified. No universal ZoC means another spatial or information tool does the work; telegraphing, terrain or body blocking alone does not secretly make a zone.
• Standoff resolution (Diplomacy): Diplomacy reveals all players' orders simultaneously, resolves support by strength, and leaves equal-strength units in their original provinces when they claim the same province. A standoff resolves a destination conflict; it does not model continuous pressure from every adjacent unit.

Sources

1. James F. Dunnigan, The Complete Wargames Handbook, p. 84: Zone of ControlZone of Control represents the six hexes surrounding a unit that the unit controls. This allows some units to spread out as they would to cover more territory while concentrating others for a crucial attack.
2. Lauri Teppo, Concepts, Ideas, and Frameworks Emerging from Operational-Tactical Wargames, pp. 51–52: area of influenceThis element is often used in wargaming as a zone of control, i.e., an enemy unit cannot move through a friendly zone of control without slowing down or engaging in combat
3. Old World, Official User Manual, p. 79: Zone of ControlA whole line of units, however, can exert ZOC over a massive area and really shut down an enemy’s options.
4. Matrix Games, WEGO WW2: Stalingrad Game Manual, p. 66: ZOC value display and movement point costsA hex’s ZOC value is the cost in additional Move Points that an enemy unit must expend to enter that hex
5. Matrix Games, WEGO World War II: Overlord Dev Diary #1, movement slices and reconnaissance withdrawalThis check repeats every slice, since the enemy’s position changes constantly.

Use it on your project

teardown-apply: hold "Zone of control" (zone-of-control) from the teardown at https://teardownatlas.com/game-design/ against my project

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