This article by Sebastian Junger details the re-integration experience of many combat vets.
"Though only 10 percent of American forces see combat, the U.S. military now has the highest rate of post-traumatic stress disorder in its history.
The first time I experienced what I now understand to be post-traumatic stress disorder, I was in a subway station in New York City, where I live. It was almost a year before the attacks of 9/11, and I’d just come back from two months in Afghanistan with Ahmad Shah Massoud, the leader of the Northern Alliance. I was on assignment to write a profile of Massoud, who fought a desperate resistance against the Taliban until they assassinated him two days before 9/11. At one point during my trip we were on a frontline position that his forces had just taken over from the Taliban, and the inevitable counterattack started with an hour-long rocket barrage. All we could do was curl up in the trenches and hope. I felt deranged for days afterward, as if I’d lived through the end of the world."
For the full article: http://www.vanityfair.com/news/2015/05/ptsd-war-home-sebastian-junger