But not with sheep--there you're right. A society of sheep will always be enslaved, whether it's invaded or not.
OK the best historical model I can find for this is the Spartan/Helot relationship. Spartans defeat a formerly free group and hold them in bondage with far fewer numbers. And it lasted quite awhile. I'm just saying that it happens and it's going to be tried again, to fail or not.
Using the fictional Barakastan, would it not be better to stop an enemy at the border before the looting begins than to live under an oppressive boot. Gorilla war is an option but that sucks.
Best of all is to kill your enemy before he has a chance to kill you.
