Kriegsspiel[a] is a genre of wargaming developed by the Prussian Army in the 19th century to teach battlefield tactics to officers. The word Kriegsspiel literally means "wargame" in German, but in the context of the English language it refers specifically to the wargames developed by the Prussian army in the 19th century. Kriegsspiel was the first wargaming system to have been adopted by a military organization as a serious tool for training and research.
It is characterized by high realism, an emphasis on the experience of decision-making rather than on competition, and the use of an umpire to keep the rules flexible and manage hidden information. After Prussia's impressive victory over France in the Franco-Prussian War, other countries began designing similar wargames for their own armies.
Most forms of Kriegsspiel involve at least two teams of players and one umpire gathered around a map. The map represents a battlefield. Each team is given command of an imaginary army which is represented on the map using little painted blocks. Each block represents some kind of troop formation, such as an artillery battery or a cavalry squadron. The players command their troops by writing their orders on paper and giving them to the umpire. The umpire will then read these orders and move the blocks across the map according to how he judges the imaginary troops would interpret and execute their orders. The outcomes of combat are determined either by simple mathematical calculations or the umpire's judgement.
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