Zone of control (abbreviated ZOC or ZoC) is a game mechanic in Civilization VI and its expansions that affects unit movement. It prevents a unit from entering a tile adjacent to an enemy unit and moving out of it within the same turn; attacks against units in said tiles, however, can be made normally.
Many units and certain districts exert zone of control against all hostile units - specifically, those of Barbarians, Free Cities, and any civilization or city-state with which their owner is at war. They are:
- Every land unit that can perform a melee attack:
- A few specialized land units with ranged attacks:
- Certain Districts:
- All naval units except the Submarine and Nuclear Submarine
Under normal circumstances, a zone of control affects all adjacent tiles in the unit's native element - in other words, land units (whether on land or embarked) do not exert zone of control on water tiles and naval units do not exert zone of control on land tiles. City Centers and Encampments, however, exert zone of control on all adjacent land and water tiles, and embarked land units exert zone of control on the tile they occupy, which can be helpful when trying to put a coastal city under siege.
Units cannot exert zone of control on tiles across a River. They can, however, exert it against districts, including City Centers and Encampments.
Religious units of different civilizations and different religions always exert a zone of control against each other, while religious units of the same religion never exert a zone of control against one another, regardless of which civilization they belong to or their owners' relationship status.
Districts can exert a zone of control against religious units of other civilizations, but only when at war.
A unit entering a zone of control cannot move to another tile until after it attacks an adjacent unit or city. The unit can also perform other actions like Plundering Trade Routes, Pillaging, or promoting if it has enough Movement left. Civilian units like Settlers, Builders, and Great People will lose all remaining Movement upon entering a zone of control and cannot perform any other actions, even if the tile they enter is occupied by a friendly military unit.
Units that enter a zone of control can still attack like normal, if they have enough Movement left to perform the attack. Units with innate abilities or promotions that allow them to move after attacking can leave the zone of control within the same turn that they enter, if Movement allows. Therefore, this ability is actually stronger than it sounds, especially for units with a ranged attack (such as upgraded recon units and Voi Chiến).
A unit that starts its turn within a zone of control can always leave the zone, as long as it has not moved or attacked that turn. If it moves into another zone of control, it will be subjected to the normal zone of control rules.
There are units that ignore zone of control completely. They are:
- All cavalry units (light, heavy, and ranged)
- Naval raider units
- Viking Longship (Harald Hardrada only)
- Air fighter units
- Air bomber units
All civilian units, support units, and Great People are affected by zone of control. However, when in formation with a unit that ignores zone of control, the non-military unit also ignores zone of control.
- Added in the Fall 2017 Update.
- Introduced in the Maya & Gran Colombia Pack.