MilSim, an abbreviation of
military simulation
Military simulations, also known informally as war games, are simulations in which theories of warfare can be tested and refined without the need for actual hostilities. Military simulations are seen as a useful way to develop tactical, strategi ...
, refers to
live-acted simulation
A simulation is the imitation of the operation of a real-world process or system over time. Simulations require the use of Conceptual model, models; the model represents the key characteristics or behaviors of the selected system or proc ...
of
armed conflict
War is an intense armed conflict between states, governments, societies, or paramilitary groups such as mercenaries, insurgents, and militias. It is generally characterized by extreme violence, destruction, and mortality, using regular ...
scenarios conducted by civilians for
entertainment
Entertainment is a form of activity that holds the attention and interest of an audience or gives pleasure and delight. It can be an idea or a task, but is more likely to be one of the activities or events that have developed over thousa ...
,
sport
Sport pertains to any form of Competition, competitive physical activity or game that aims to use, maintain, or improve physical ability and Skill, skills while providing enjoyment to participants and, in some cases, entertainment to specta ...
ing or
nostalgic purposes.
It has been described as both a form of "
extreme sport"
and as
historical reenactment.
MilSim includes activities that strive to provide an experience of combat, simulate battlefield missions, or replicate military service-style training. The training is simulated because participants engage in mock scenarios and do not actually engage in real conflicts or use real weaponry. There are several forms of MilSim: physical
shooting sports
Shooting sports is a group of competitive sport, competitive and recreational sporting activities involving proficiency tests of accuracy, precision and speed in shooting — the art of using ranged weapons, mainly small arms (firearms and airgun ...
(e.g.
airsoft
Airsoft is a team game in which participants eliminate opposing players by tag (game), tagging them out of play with airsoft pellets, spherical plastic projectiles shot with mock air gun, air weapons(usually powered by an electronic motor) call ...
,
paintball, or
laser tag) with an emphasis on realism based on military scenarios and team tactics; historical reenactment of famous battles; stylistic imitations of a specific military era or focus, such as
cosplaying; and military-themed
e-sports (e.g.
video game
Video games, also known as computer games, are electronic games that involves interaction with a user interface or input device such as a joystick, controller, keyboard, or motion sensing device to generate visual feedback. This fee ...
s).
Airsoft guns are used commonly in MilSim due to their cosmetic realism, satisfactory
external ballistics, compatibility with genuine firearm accessories, and inexpensive ammunition. Alternatively, mock weapons which fire blanks and
blank guns may be used to add immersion in events such as MilSim West.
Gel ball blasters are also used by MilSim players who live in countries where airsoft guns are either restricted or banned by law.
Events can span between historical or imaginary battles,
law enforcement
Law enforcement is the activity of some members of government who act in an organized manner to enforce the law by discovering, deterring, rehabilitating, or punishing people who violate the rules and norms governing that society. The term en ...
-style
CQC engagements, or freestyle
urban/
jungle warfare-themed
light infantry
Light infantry refers to certain types of lightly equipped infantry throughout history. They have a more mobile or fluid function than other types of infantry, such as heavy infantry or line infantry. Historically, light infantry often fought ...
skirmishes.
Large events usually have rigid requirements for entry, and can last several days without leaving the playfield. The experience often includes
camping
Camping is an outdoor activity involving overnight stays away from home, either without shelter or using basic shelter such as a tent, or a recreational vehicle. Typically, participants leave developed areas to spend time outdoors in more nat ...
, food preparation, transportation, and other
military logistics
Military logistics is the discipline of planning and carrying out the movement, supply, and maintenance of military forces. In its most comprehensive sense, it is those aspects or military operations that deal with:
* Design, development, acqui ...
. MilSim differs from the sports of airsoft or paintball - though all rely on tactics and marksmanship, MilSim has a focus on
authenticity
Authenticity or authentic may refer to:
* Authentication, the act of confirming the truth of an attribute
Arts and entertainment
* Authenticity in art, ways in which a work of art or an artistic performance may be considered authentic
Music
* A ...
to real-world
military doctrine
Military doctrine is the expression of how military forces contribute to campaigns, major operations, battles, and engagements.
It is a guide to action, rather than being hard and fast rules. Doctrine provides a common frame of reference across ...
s.
There are often
fireteams with designated roles, such as simulated
combat medic
A combat medic, or healthcare specialist, is responsible for providing emergency medical treatment at a point of wounding in a combat or training environment, as well as primary care and health protection and evacuation from a point of injury ...
s and
support gunners.
Loosely originating in
Japan
Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north ...
in the 1980s, MilSim events are now bolstered by an active
Internet
The Internet (or internet) is the global system of interconnected computer networks that uses the Internet protocol suite (TCP/IP) to communicate between networks and devices. It is a '' network of networks'' that consists of private, pub ...
scene. An American presenter, MSATO, claims that MilSim is the "fastest-growing extreme sport worldwide."
The largest events can attract thousands of attendees, though players must often source their own equipment, such as specific uniforms, radios, and weapons. Attendees are diverse, consisting of hobbyists,
military veterans
A veteran () is a person who has significant experience (and is usually adept and esteemed) and expertise in a particular occupation or field. A military veteran is a person who is no longer serving in a military.
A military veteran that has ...
, or enthusiasts as young as 13. In the
United Kingdom
The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the continental mainland. It comprises England, Scotland, Wales and North ...
, airsoft organizers run in conjunction with
Live Action Role-Players (LARP) at
British Army
The British Army is the principal land warfare force of the United Kingdom, a part of the British Armed Forces along with the Royal Navy and the Royal Air Force. , the British Army comprises 79,380 regular full-time personnel, 4,090 Gurk ...
training facilities, such as
Copehill Down
Copehill Down is a Ministry of Defence training facility near Chitterne on Salisbury Plain, Wiltshire, England. It is a 'FIBUA' (Fighting In Built Up Areas) urban warfare and close quarters battle training centre, where exercises and tests are c ...
and
Catterick Garrison. Elsewhere, combat stages are often salvaged from abandoned buildings and private woodland. Many of the larger playfields are leased to
ROTC
The Reserve Officers' Training Corps (ROTC ( or )) is a group of college- and university-based officer-training programs for training commissioned officers of the United States Armed Forces.
Overview
While ROTC graduate officers serve in all ...
groups or civilian
first-responders for their own simulation training.
Reenactments

Similar to
historical reenactments, MilSim reenactments have a focus on historical accuracy to a specific event. All weaponry, uniforms, and equipment are suggested or required to be period-accurate. Food, terminology, and living arrangements can be inspired by the period; such as
World War II
World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposin ...
,
Desert Storm
The Gulf War was a 1990–1991 armed campaign waged by a 35-country military coalition in response to the Iraqi invasion of Kuwait. Spearheaded by the United States, the coalition's efforts against Iraq were carried out in two key phases: ...
, or the
Yugoslav Wars
The Yugoslav Wars were a series of separate but related#Naimark, Naimark (2003), p. xvii. ethnic conflicts, wars of independence, and Insurgency, insurgencies that took place in the Socialist Federal Republic of Yugoslavia, SFR Yugoslavia from ...
. Sides are usually not glorified, and attendees are encouraged to see battles through the eyes of an ordinary soldier.
Unlike historical reenactments, which are largely scripted, MilSim events involve creating strategies - on a
platoon
A platoon is a military unit typically composed of two or more squads, sections, or patrols. Platoon organization varies depending on the country and the branch, but a platoon can be composed of 50 people, although specific platoons may range ...
scale and
squad
In military terminology, a squad is among the smallest of military organizations and is led by a non-commissioned officer. NATO and US doctrine define a squad as an organization "larger than a team, but smaller than a section." while US Army do ...
scale - to defeat opponents.
War historians are occasionally consulted to help stage the field.
Regularly, military veterans from several nations will attend or organize events, giving further accuracy to first-aid training, current terminology, clothing, and tactics.
When attendees must source their own equipment, costs can sometimes be thousands of dollars.
Occasionally, loaner equipment is provided to beginners.
Simulations
MilSim simulations are fictionalized scenarios with a realistic objective; these can include hostage rescue, bomb defusal, or fictionalized skirmishes, and include law enforcement or militia-themed scenarios. These promote a "tactical playstyle" above casual airsoft.
Players are often given an extensive briefing, containing storylines, mission tactics, and
rules of engagement. Most simulations strive for immersion and tension in players.
MilSim simulations are usually smaller, and more frequent, than reenactments.
Uses

Robert Silverman of ''
Vocativ'', embedded in a two-day MilSim (inspired by 2003's ''
Tears of the Sun''), writes that "the appeal is in ... the realism of an unreal world, plus a deep desire for the camaraderie and teamwork you'd find in a real military unit." He speculates that the "pure adrenaline free from inflicting actual harm ... strikes at something embedded deep within the core of sports."
''Places Journal'', referring to the presence of
veteran
A veteran () is a person who has significant experience (and is usually adept and esteemed) and expertise in a particular occupation or field. A military veteran is a person who is no longer serving in a military.
A military veteran that has ...
and civilian players describe MilSim as a "ladder leading up to the war and a ladder for coming back down". Notably, veterans (rather than, or in addition to, mental health care) "use war games as self-administered
PTSD treatment".
Recently, advances in airsoft replica authenticity have led numerous law enforcement and military units to train with airsoft guns in
CQB/CQC environments. MilSim events have encouraged the
US Army
The United States Army (USA) is the land service branch of the United States Armed Forces. It is one of the eight U.S. uniformed services, and is designated as the Army of the United States in the U.S. Constitution.Article II, section 2, cla ...
to promote enlistment.
Video games
Mil-sim is also the descriptor for a
genre of video games, often overlapping with the
tactical shooter genre, containing more "realistic" mechanics and consequences than typical
first-person shooter
First-person shooter (FPS) is a sub-genre of shooter video games centered on gun and other weapon-based combat in a first-person perspective, with the player experiencing the action through the eyes of the protagonist and controlling the pl ...
s or
action game
An action game is a video game genre that emphasizes physical challenges, including hand–eye coordination and reaction-time. The genre includes a large variety of sub-genres, such as fighting games, beat 'em ups, shooter games, and platform gam ...
s. Games such as ''
ARMA'', rather than pure entertainment, are a simulation of equipment and tactics, and are sometimes used for military training and mission rehearsal.
Other games, such as the ''
Red Orchestra'' series, feature some realistic aspects in their gameplay. Mil-sims can be differentiated from other shooter games in that, commonly:
*Firearms are modeled after real life. Bullets are grouped by
magazines (rather than an ammo pool), gunshot wounds are usually fatal, and bullets are physically simulated, requiring the player to account for wind and
gravity
In physics, gravity () is a fundamental interaction which causes mutual attraction between all things with mass or energy. Gravity is, by far, the weakest of the four fundamental interactions, approximately 1038 times weaker than the stro ...
.
*The games' systems account for various needs. Vehicles may have limited cargo space, and characters can become severely fatigued, including hunger and thirst.
*Community-run MilSim events, within these video games, often have players undergo "training". A player might be trained in military tactics that will give them an advantage in the game.
See also
*
Renaissance fair
A Renaissance fair, Renaissance faire or Renaissance festival is an outdoor gathering open to the public and typically commercial in nature, which purportedly recreates a historical setting for the amusement of its guests. Some are permanent the ...
*
Urban exploration
Urban exploration (often shortened as UE, urbex and sometimes known as roof and tunnel hacking) is the exploration of manmade structures, usually abandoned ruins or hidden components of the manmade environment. Photography and historical inter ...
References
{{DEFAULTSORT:Milsim
Combat sports