Kriegsspiel
The Prussian officer’s training game in which players command armies they cannot fully see, leaving the fog of war to an umpire who alone knows the whole field.

Kriegsspiel is a genre of umpire-moderated wargaming developed by the Prussian Army in the 19th century to teach battlefield tactics to officers, and was the first wargaming system adopted by a military organisation as a serious tool for training and research.1216 The word translates literally from German as “wargame”, but in English usage it refers specifically to the Prussian systems devised by Georg von Reisswitz and adopted by the Prussian Army, and to the later games built on their principles.112 It is frequently described as “the mother of all wargames”, with later wargaming traditions held to descend from it.212 The first modern wargame is generally considered to be Kriegsspiel, published in Prussia in 1824 by First Lieutenant Georg Heinrich Leopold Freiherr von Reisswitz.16

The game was invented in the first years of the 19th century by Baron von Reisswitz, a civil administrator with an interest in military matters.2021 His son, First Lieutenant Georg Heinrich Rudolf Johann von Reisswitz, refined the system into a training tool, and the rules he developed in 1824 are the most famous of the early versions.316 These 1824 rules, formally an instruction for representing military manoeuvres with the apparatus of the wargame, were recommended from the highest level to all Prussian officers for their training.410 The roughly sixty-page manual went beyond the text of its rules, including instructions for making playing pieces and a playing surface from enclosed sheets of paper and maps, whose configuration opened up the tactical space of the Napoleonic era.4 Aimed at the detachment level with two-minute turns, the system was detailed and slowed by minutiae.3
What distinguishes Kriegsspiel from most later wargames is its method of play.12 The game is played double-blind: the players on each side do not see what their opponents are doing unless they are in direct contact, while an umpire reports what each player can observe, enforces the rules, and resolves movement, combat and other events.12 The umpire keeps a master map on which the positions of both sides are tracked, and at the end of the battle the umpire’s table is revealed to the players and a critique is offered.1213 Additional devices that heighten realism include limiting a commander’s view-range, order delays and dispatch delays, all of which reproduce the friction and fog of war experienced by commanders in the field.13 Players need not know the rules; all processing is handled by the umpire, and players are in fact advised not to read the rules so as to avoid a “gamey” approach of exploiting the system.23
Games are typically structured around a chain of command, so that low-level players control a handful of unit pieces—infantry, artillery or cavalry depending on the setting—while intermediate and overall commanders direct them, allowing players to experience both giving and receiving orders amid incomplete and outdated intelligence.13 Combat in the rigid systems was resolved using dice and tables, with specially made Kriegsspiel dice intended to abstract combat effects.317
Rigid and free Kriegsspiel
Historically the rulesets divided into two broad approaches: the heavily detailed “rigid” Kriegsspiel and the minimal “free” Kriegsspiel.3 The rigid line ran from Reisswitz’s 1824 rules through later refinements.3 New iterations for military use were much discussed in the 1870s, and in 1871 von Tschischwitz published his “Guide to Kriegsspiel”, a slightly more streamlined version of Reisswitz’s system.3 In 1873 Jakob Meckel published his “Studies on Kriegsspiel” together with fictional maps designed for the game, arguing that many elements of rigid Kriegsspiel hindered its use.3
The radical counterpart was free Kriegsspiel, whose most prominent advocate was the German general Verdy du Vernois.3 In his 1876 book Verdy argued that, to speed up play, umpires should simply judge the outcome of a given combat situation and assign odds—rolling a common six-sided die, or no dice at all.3 Verdy’s 1876 free Kriegsspiel is credited with launching a new generation of wargames using minimal rules and tables, aiming for realism as decided by the umpire; the system was later taken up in adapted form, including the Victorian Army’s 1896 war game.8
Modern practice and legacy
Kriegsspiel remains in use by the world’s militaries and has a substantial hobbyist following.12 The International Kriegsspiel Society, described as the largest online association dedicated to the game, unites over 4,100 members from around the world and plays largely through Tabletop Simulator over the internet, running both play-by-post games—often requiring only minutes a day—and live games lasting between three and eight hours.21213 The society endorses the Derby House Principles for inclusion and diversity in professional wargaming and charges no dues, fees or examinations for entry.212
Society members have developed new rule systems, among them the Napoleonic Ottovski System designed by Otto Salo for Napoleonic pitched battles with battalions, squadrons and batteries as pieces and fifteen-minute turns, a Second World War Ottovski System portraying company-level combat in which each block is a platoon, the K22 system designed by Marshall Neal and heavily inspired by Reisswitz’s 1824 rules at detachment level with five-minute turns, and the Citizen Soldiers system for division-level battles of the American Civil War by master umpire Carter McNish.3 Many of these systems remain unwritten or under constant development, since their design is treated as bound up with the study of military history.3
The historical rules continue to be reprinted and sold: the publisher Too Fat Lardies offers English editions of the 1824 and 1862 (Tschischwitz) rules along with reproduction maps such as the Meckel, Königgrätz and Metz maps, while Command Post Games produces Kriegsspiel blocks, dice, a measuring apparatus and scenario sets for battles including Waterloo, Brandy Station, Brandywine and Bunker Hill.517 Computer descendants include realtime titles such as Kriegsspiel ~ 7 Years’ War by La Forge du Code, in which the player commands armies but depends on couriers to send orders and to learn the situation on the battlefield.14 A community of enthusiasts also maintains forums and Discord servers dedicated to traditional Reisswitz games, free and email Kriegsspiels, and computer-moderated play.1
The game is widely held to be the ancestor of all modern wargames, which according to enthusiasts are descended from it, though most lack its central fog-of-war element.12 Dungeons & Dragons is described as directly modelled from Kriegsspiel.12 The lineage runs deeper still: scholarship traces the marriage of the printed book to a playing surface back to 17th-century works such as Duke August the Younger’s treatise on chess and Christoph Weickhmann’s mid-17th-century “King’s Game”, which sought to derive political and military maxims from play and to lay out a “Staats- und Kriegsrath” from the systematic application of the game.4
Sources
Forum dedicated to Kriegsspiel, wargaming, and related PC games with discussion sections on rules, gameplay, and organized matches.
kriegsspiel.forumotion.net · retrieved Jun 28, 2026International Kriegsspiel Society website, a global community of over 4,100 members studying, discussing, and playing Kriegsspiel wargames.
kriegsspiel.org · retrieved Jun 28, 2026Collection of historical and modern Kriegsspiel rule systems ranging from the 1824 Reisswitz rules to contemporary variants.
kriegsspiel.org · retrieved Jun 28, 2026Academic article examining the tactical Kriegsspiel system from 1812-1824 and its material and epistemological dimensions as a game medium.
web.archive.org · retrieved Jun 28, 2026Too Fat Lardies online shop selling historical Kriegsspiel rules, scenario books, and maps for wargaming.
toofatlardies.co.uk · retrieved Jun 28, 2026Google Books entry for Verdy's Free Kriegsspiel including Victorian Army 1896 war game rules with minimal gameplay tables.
books.google.com · retrieved Jun 28, 2026Internet Archive digital copy of Reisswitz's 1824 original German instruction manual for Kriegsspiel.
archive.org · retrieved Jun 28, 2026International Kriegsspiel Society explanation of what Kriegsspiel is, its history, gameplay mechanics, and community welcome.
kriegsspiel.org · retrieved Jun 28, 2026Personal account by an IKS Master Umpire describing his journey from roleplay games to Kriegsspiel and its gameplay experience.
kriegsspiel.org · retrieved Jun 28, 2026Steam store page for upcoming Kriegsspiel Seven Years War real-time wargame with courier-based command system.
store.steampowered.com · retrieved Jun 28, 2026Armchair Dragoons article about Lieutenant Georg von Reisswitz's 1824 Kriegsspiel as the first modern wargame.
armchairdragoons.com · retrieved Jun 28, 2026Command Post Games online shop selling Kriegsspiel scenarios, blocks, dice, maps, and related wargaming equipment.
commandpostgames.com · retrieved Jun 28, 2026Blog article discussing Baron von Reisswitz's invention of Kriegsspiel in early 19th century as a war-game.
kriegsspielorg.wordpress.com · retrieved Jun 28, 2026Matrix Games forum discussion about Kriegsspiel's invention by Baron von Reisswitz in early 19th century.
forums.matrixgames.com · retrieved Jun 28, 2026