Get a worker to fortify himself in a city or town that you do not want to be captured in a war. Have it be fortified, and it has to be a worker. When an enemy attacks the city, it will do so, but will hurt itself. Note: The enemy will probably retreat in battle. Note: If you have a unit that can attack others instead of a worker, the opponent will die but your person will usually be only slightly damaged. Note: Catapults, ships, airplane, etc. that attack with a bombardment will not be affected.