Fog of war

Fog of war

The fog of war is a term used to describe the level of ambiguity in situational awareness experienced by participants in military operations.Joint Service Command and Staff College, Advanced Command and Staff Course Notes dated 2001

The term seeks to capture the uncertainty regarding own capability, adversary capability and adversary intent during an engagement, operation or campaign.

Origin of the Term

The term is ascribed to the Prussian military analyst Carl von Clausewitz, who wrote: "The great uncertainty of all data in war is a peculiar difficulty, because all action must, to a certain extent, be planned in a mere twilight, which in addition not infrequently — like the effect of a fog or moonshine — gives to things exaggerated dimensions and unnatural appearance." [Clausewitz, Carl von. "On War". Book 2, Chapter 2, Paragraph 24.]


Causes of this ambiguity vary according to the level at which participants are:

Grand Strategic

Ambiguity is related to the political intent, capabilities and logistical strengths of an adversary, sources of information include diplomatic intelligence, secret (or special) intelligence, strategic modelling and data derived from open source intelligence. Participants seek to understand intent of and political motivations. Outcomes at this level may encompass military action but are more concerned with socio-political and economic outcomes from which it will cascade.

Military Strategic

Militarily the ambiguity experienced at this level relates to the structure, strength, capability and disposition of own and adversary offensive and defensive assets. Own force ambiguity can be caused by failure to report material deficiencies or an unwillingness to escalate concerns, leading to an optimistic view of own capabilities. Adversary ambiguity may be a result of inaccurate intelligence, sources being subverted or deceived, or adversary intelligence presenting a superior picture allowing ones decision cycle to be compromised. In addition, Murphy's Law plays a role in hampering long term planning, as unanticipated situations will always arise.


Within the operational theatre the commander undertakes tasks as directed by the Military Strategic level, ambiguity continues to relate to adversary capability and intent but is coupled with own directive ambiguity, the commander not having the full sight of the strategic imperative. As operational tempo increases at this level the ambiguity experienced by the commander is susceptible to delays in communication of the tactical situation and the ebb and flow of own force, and adversary force interaction. The commander seeks to penetrate the fog of war through significant use of reconnaissance assets and a comprehensive Joint Operational Picture.


Ambiguity stems from several factors at the tactical level, both by deliberate means by the enemy (including active deception and/or electronic attack on communications and sensors) as well as factors inherent to battle resulting in lack of comprehension by commanders as to the tactical environment, the logistic status of their own units, how they are interacting with each other, or their intentions.

This lack of comprehension can stem from many factors, individually or in combination, such as
*poor reconnaissance
*inaccurate intelligence
*faulty communication

The tempo of decision making at the tactical level is much greater than at other levels, increasing the risk of escalating ambiguity as assumptions build and resources are allocated based on those assumptions.


The practical experience of the "fog of war" is most easily demonstrated in the tactical battlespace. It may include military commanders' incomplete or inaccurate intelligence regarding their enemy's numbers, disposition, capabilities, and intent, regarding features of the battlefield, and even including incomplete knowledge of the state of their own forces. Fog of war is caused by the limits of reconnaissance, by the enemy's feints and disinformation, by delays in receiving intelligence and difficulties passing orders, and by the difficult task of forming a cogent picture from a very large (or very small) amount of diverse data. When a force engages in battle and the urgency for good intelligence increases, so does the fog of war and chaos of the battlefield, while military units become preoccupied with fighting or are lost (either destroyed by enemy fire or literally lose their way), reconnaissance and liaison elements become unavailable, and sometimes while real fog and smoke obscure vision.

Much of the modern military's technological efforts, under the rubric of command and control seek to reduce the fog of war. Although even the most advanced technology cannot completely eliminate it, military theorists continue to develop ways to reduce it.

Simulations and games

, playing pieces are hidden from the opponent by tracking them on paper or by using a duplicate, hidden game board.

Solitaire games also by their nature attempt to recreate fog of war using random dice rolls, card draws, or flowcharts to determine events, for example "Ambush!".

Complex double-blind miniatures wargames, including cloth model training exercises for military commanders, may make use of two identical maps or model landscapes, one or more referees providing limited intelligence to the opposing sides, participants in the roles of sub-unit leaders, and the use of radio sets or intercoms.

The term "fog of war" has become jargon in military and adventure video and computer games, in the more limited sense of enemy units or characters being hidden from the player. Often this is done by obscuring sections of the map already explored by the player with a grey fog whenever they do not have a unit in that area to report on what is there. The player can still view the terrain but not any enemy units on it. One early use of fog of war was the 1978 game "Tanktics" designed by Chris Crawford, which was criticized for its fog of war system detracting from the fun of the game. Crawford later noted that "...when the games get too realistic, they lose their appeal."citation | date = April 1988 | periodical = Computer Gaming World | title = "Fog of War": A Clearer View | year = 1988 | pages = 24-26, 52-53]

Two of the most successful Blizzard franchises, Warcraft and Starcraft, also use a similar fog of war which only reveals terrain features and enemy units through a player's reconnaissance. Without a unit actively observing, previously revealed areas of the map are subject to a shroud through which only terrain is visible, but not changes in enemy units or bases. EA Games' (formerly Westwood Studios') franchise Command & Conquer has incorporated a similar fog of war through the series, as has Activision's "Dark Reign". Similarly, in the classic Empire computer game, a player can only observe an enemy unit if it is the vicinity of one of the players units or cities. In some games, such as "", it is possible for the player to artificially recreate a fog of war against his opponent. In turn-based strategy games of the Advance Wars,Field Commander and Fire Emblem series, "Fog of War" literally refers to a fog which shrouds the most part of a map, but merely as a form of in-game handicap, but in Fire Emblem "fog of war" is simply coined as 'fog' due to its medieval style. Sid Meier's turn-based franchise Civilization and its spin-off Alpha Centauri obscure parts of the map not occupied by the player or allies until the advent of orbital flight is reached by the player.

In the Commands & Colors series of boardgames, designed by Richard Borg, the fog of war is simulated by a deck of cards from which the players can pick their actions. Different sides of the battle usually have a different number of cards (each one describing a possible action) and players have to choose which card to use. It often happens that the best action imaginable in that moment is impossible to do because the player does not have a useful card for it. This is to simulate the difficulty of in-battle communication in the heat of the moment.


[] The Fog of War and Friction in Current Conflicts: FundamentalAspects of the Management of Modern Conflicts- article by LCdr (Brazilian Navy) Caninas, Osvaldo P.

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