The St. Louis paper had an editorial cartoon on the subject of the war in Afghanistan, it showed an armored convoy going past some grave markers. The theme was Afghanistan, Graveyard of Empires. I think they forgot to include Alexander the Great, but he was only weakened by Afghanistan, not totally finished off if I am not mistaken. I believe the Great Indian Desert did for his men.
Anyway, Afghanistan's gift for doing in foreigners who arrive with more advanced technology, is well know. We Americans already got beat by an enemy at a lower tech level in Vietnam. We should be thinking about this, and whether Afghanistan is even worth it.