We can't really answer that question. Indeed, it might be much better for you to speak with experts in the field. As far as I know, the military can apply selection tests and psychometric tests. Some employers make potential employees undergo psychometric tests. They do so to find the right person for the job, if they're looking for one type of personality rather than another, so they will base their choice on the results of those tests. The same approach could be taken to help a person deal with the potential fallout from an event before or after it happens. The way trauma is treated can affect the way PTSS develops. So what you're talking about is doing research on the ground within the military.
On April 3rd, 2008. See this statement in context.