Many of the symptoms of depression are also the same symptoms as adrenal fatigue. But not too many MDs even know what adrenal fatigue is, much less how to treat it. Soldiers coming home after multiple stresses to their adrenal system need to be given more than just anti-depressants and a few therapy sessions.
There is an excellent book called "Adrenal Fatigue: The 21st Century Stress Syndrome," by James L. Wilson, a naturopathic doctor. You can find it on Amazon. It covers what the syndrome is, how its caused, how you can be tested to find out for certain if you have it, and how to recover from it. I highly recommend it. There are no easy fixes though - it requires changing dietary habits, taking supplements, changing your sleep cycles, among other things.
One interesting point he makes in the book is how certain forms of alcoholism are brought on by adrenal fatigue - the hypoglycemia caused by run-down adrenals predisposes a person to a compulsive desire for alcohol in order to "jump start" an exhausted system. Seeing as how alcoholism tends to become a problem among returning veterans, it makes sense.
The fact of the matter is that the survival instinct is the most powerful force in man’s arsenal. Psychiatrists and psychologists spend way too much time making up reasons why we CAN’T survive without them, (because THEY cannot survive without us.)
The fight or flight mechanism is on such a hair trigger for these guys and gals, that a period of readjustment is absolutely necessary. Treating them with psychotropes and other will suppressing drugs is dangerous to the nth degree.