In the past seven months, at least 11 soldiers and three Marines have committed suicide in Iraq, military officials say. That is an annual rate of 17 per 100,000. The Navy also is investigating one possible suicide. And about a dozen other Army deaths are under investigation and could include suicides.
According to the National Institute of Mental Health, the suicide rate in the general population is 10.6 per 100,000.
http://www.nimh.nih.gov/research/suifact.cfmIf the cases under investigation prove to be suicide, they will have rates in Iraq that are more than double. I don't see why it would be that difficult to understand and if you think how many National Guard units are out there. I don't think this is what they had in mind when they signed up.
The more frightening aspect of this it the hundreds who will come home with their minds permanently scrambled. The first gulf war gave us Timothy McVeigh as was the sniper John Allen Muhammad.