I would love to see guerilla warfare in civ but it hasnt been so as i believe. So hers some suggestions I thought of today if you would like to create a Guerila Warfare. Instead of going after your opponent's cities, try just having your objective of raiding their cities. This is kind of guerrila warfare. Tell me what you think. Spies could do guerrila warfare since they can do things like poison water and destroy tiles. It would be really cool, but make the game more complicated if they made enemy units coming into your city need resources like water. That way you can destroy your own resources as has happened in history so many times so that the invaders cant supply themselves and are forced to retreat. In this concept you can burn down supplies and stone your water so the enemy cant get it. Tell me what you think!