Remember the fourth Indiana Jones film, where a struggle for water was the villain's evil plot? And you thought it was just fantasy? It wasn't.
See this article from Transhumanity which lays out nine different world regions where nations may realistically come to blows over water. There are examples in southeast Asia, Central Asia, the Indian subcontinent, Africa, and the Middle East.
It's a good thing northern and southern California don't have their own armies, as a battle over the north's water could certainly ensue. Hat tip to RealClearWorld for the link.
