Command

Command — 1. The authority that a commander in the armed forces lawfully exercises over subordinates by virtue of rank or assignment. 2. An order given by a commander; that is, the will of the commander expressed for the purpose of bringing about a particular action. 3. A unit or units, an organization, or an area under the command of one individual. See also combatant command; combatant command (command authority).

Sources:

DOD Dictionary of Military and Associated Terms/ As of January 2021. p.370