Fog of war

The Fog of War refers to the lack of vision and information on areas of the map that have not had a friendly unit explore it, or areas that were explored and but have since been abandoned. In the former case, the area is shown as being totally black. In the latter case, only the terrain and buildings in their last known state (EG. Being built, burning/bleeding) are shown. Updated information on such areas can be gathered by sending a unit (Such as a Sensor) into it, or conducting a Scanner Sweep).