1. a. The authority that a commander in the military service lawfully executes over subordinates by virtue of rank or assignment. This include the authority and responsibility for effectively using available resources and for planning the employment of organizing, directing, coordinating and controlling military or other peace keeping forces for the accomplishment of assigned missions. It also includes responsibility for health, welfare, morale and discipline of assigned personnel. b. An order given by a commander, that is, the will of the commander expressed for the purpose of bringing about a particular action. c. A unit or units, an organization, or an area under the command of one individual. d. To dominate by a field of weapon fire or by observation from a superior position.