Creating drug addicts and murderers, among other things, apparently.
This article from Siun at Firedoglake highlights a disturbing series of events relating to a unit of the US Army that came home, but brought the Iraq War with them.
Guess what? They've been redeployed to Afghanistan.
Despite what people will tell you, you can't switch off the war when you get back from it. Even as far back as World War One, the British poet Wilfred Owen wrote:
"-- These are men whose minds the Dead have ravished.
Memory fingers in their hair of murders,
Multitudinous murders they once witnessed.
Wading sloughs of flesh these helpless wander,
Treading blood from lungs that had loved laughter.
Always they must see these things and hear them,
Batter of guns and shatter of flying muscles,
Carnage incomparable and human squander
Rucked too thick for these men's extrication."
- Mental Cases
And we also have this parting word, from the Firedoglake post:
"You should remember something else. A people and their army who behave like this abroad invariably bring this criminal and brutish behaviour home and turn it against their own people. It is not only revolutions that eat their own."