>Rome>Vietnam>AfhganistanHow do you beat jungle/forest/cave/desert dwellers? People who have no kingdom, no castles, no cities to siege. You just have to play hide and seek finding 20-50 of them at a time hiding in the wilderness, and there's like a million of them to find. The longer you take, the more their children will grow up to replace them and replenish their troops. Meanwhile you have to worry about costs of war and the economy back home and shiet while they shit in the woods and eat berries.
Genocide