Military psychology is the research, design and application of psychological theories and empirical data towards understanding, predicting, and countering behaviours either in friendly or enemy forces or civilian population that may be undesirable, threatening or potentially dangerous to the conduct of military operations. Military psychology transforms from sub-branch groups of different psychology disciplines into a tool used by the military, as will all tools of the military, to enable the troops to better survive the stresses of war while using psychological principles to unbalance the enemy forces for easier wins. All stresses and psychological illnesses that military psychology looks at are not specific only to the military. However, the military soldiers tend to face a specific combination of these otherwise generic stresses. Military psychology then specializes in looking at this unique combination of stresses that plagues the military and war settings. These stresses include posttraumatic stress disorder (PTSD), guilt, family difficulties with the veteran's spouse, nightmares and flashbacks, and many more. Military psychology is applied towards counselling and treatment of stress and fatigue of military personnel or military families as well as treatment of psychological trauma.