For the it can't happen here crowd also:
http://en.wikipedia.org/wiki/General...rant.27s_Order
Read the order and see how it was applied to the men and the families after Grant issued the order.
Now, I doubt that a genocide was planned but the historians of genocide indicate that in general they start with explusion. You can even find the Nazis speaking of that. But as the historians point out when expulsion doesn't work - you may move to killlng.