To the contrary, military service is the best transition from youth to adulthood most people can make. Millions of men have been in the horrors of war and came out of it more mature and stronger than before. As for your cousin, there may have been an underlying flaw or weakness for which suicide may otherwise have come - or maybe not. The military turns boys (and girls) into men and women. For the vast majority, it is a life changing positive. But not for all.