#13 National Commanders: Caveat Mediators – Dr Regeena Kingsley In previous blogs it has been explained that Rules of Engagement (ROE) are instructions for the use of force by military forces, and that these instructions or rules relate to two specific issues – self-defence and mission accomplishment. With regard to self-defence, when individuals, groups of individuals, or an armed force are declared Enemy, it is permissible for force to be used as a matter of course and offensive action to take place. The Enemy force may be attacked, at the discretion and judgment of the military commander,