The Department of Defense Suicide Event Report Program collects extensive information on suicides and suicide attempts from the U.S. Air Force, Army, Marine Corps, and Navy. Data are compiled on demographics, suicide event details, behavioral health treatment history, military history, and information about other potential risk factors such as psychosocial stressors that were present at the time of the event. The ultimate goal of this standardized suicide surveillance program is to assist suicide prevention in the U.S. military. Descriptive data are presented on 816 suicides and 1,514 suicide attempts reported through the program between 2008 and 2010. (Contains 6 tables.)