Scorched Earth

A widely used military tactic. Used by the Russians in the Napoleonic and Nazi invasions. The trick is if you know a city or province will fall to enemy hands no matter what you do, you burn the towns and destroy all the food. That way when the enemy conquers the area they won't have any supplies or food. It really helped the Russians beat back the mentioned invasions. Do you think this could be implemented to the game with the added population casualties?