Command, Control, Communications and Intelligence, or C3I is a military term that is used to describe an infrastructure that supports joint operations by a military force. It provides the means of gathering and distributing military intelligence, and directing events, usually in a modern battlefield situation. Military intelligence (abbreviated MI, int [Commonwealth], or intel [U.S.]), is a military discipline that focuses on information gathering, analysis, and dissemination about enemy units, terrain, and the weather in an area of operations. ... See also the town of Battle, East Sussex, England Generally, a battle is an instance of combat between two or more parties wherein each group will seek to defeat the others. ...

It is the successor to Command and Control (C2 or C-squared), Command, Control and Communications (C3 or C-cubed) and Command, Control and Intelligence (C2I) as a term to describe equipment – electronic and mechanical – that supports the General Staff in the direction of tactical operations from a static or mobile headquarters. In telecommunications, command and control (C 2) is the exercise of authority and direction by a properly designated commander over assigned and attached forces in the accomplishment of the mission. ... A General Staff is a group of professional military officers who act in a staff or administrative role under the command of a general officer. ... Military tactics is the collective name for methods of engaging and defeating an enemy in battle. ... Headquarters denotes the location where most, if not all, of the important functions of an organization are concentrated. ...