Suicidal behaviour is an important issue in the military. There are some specific problems arising in the military surrounding. An army is a closed system that may restrict personal freedoms. Many servicemen loose significant relationships and have financial and psychological problems. An army is an aggressive masculine community and sometimes aggression is a part of the staff training. Firearms as a means of suicide are available in the military. A combination of psychosocial problems with availability of firearms contributes to incidents of suicide in the military. This book is dedicated to the relationship between military service and suicidal behaviour. The impact of peacekeeping missions on suicidal behaviour is also discussed. This book will be of interest to physicians, psychologists, other clinicians, experts in public health management, and military people.