#6: Ever hear of a siege? And if they stay long enough, their whole perimeter vanishes.
#5: Most soviet era vets would be too old to be of much physical help, and from what I garner, most of them are alcoholics.
#4: It's hard to predict how psychological warfare will manifest itself, so use with caution.
#3: See number 6.
#2: Water, cold, 'nuff said.
#1: And they achieved what exactly?

I know this is from Cracked and is supposed to be satire, but many will take this as straight.