I'll try tackling this one:
"Milsim", short for military simulation, is a style of live-play wargaming that emphasizes realistic procedures, scenarios, tactics, and strategy to emulate actual combat. The main difference between a milsim style game versus an actual military exercise is the emphasis on sportsmanship and entertainment, whereas military exercises are intended as training tools to prepare troops for battle and are not designed to be entertaining. Milsim games are hosted by civilians for civilians, occasionally for profit. Military exercises are held by a government's armed forces.
Milsim style games are typically played with replica firearms that discharge a low velocity, non-lethal projectile such as a paintball or plastic "airsoft" pellet in order to strike a player and count them as a casualty. A player will generally have the opportunity to rejoin the game after a period of time, being "healed" by a medic, or by returning to a staging area known as a "respawn" point.
Rules and objectives vary between events but milsim games differ from ordinary wargaming events mainly by emphasizing aspects of military operations by requiring authentic radio and interpersonal communication, uniforms and camouflage, styles of weaponry, and on-field behavior such as roleplay (i.e. after being hit a player may be required to act as if they are in pain while a medic applies a simulated bandage or other treatment). Players may be assigned to smaller groups, given specific tasks delivered as orders, and be led by commanders. In the strictest of milsim games players may be reprimanded for failing to comply with their orders or achieve their objectives.
Realistic props are often used including privately-owned military vehicles, and occasionally professional pyrotechnics to simulate explosions and gunfire. Due to the nature of the events they are held primarily in large rural areas that are either privately held or booked specifically for the event to prevent possible injury to the public from flying projectiles, and so as not to cause undue alarm from the sight of camouflaged and armed personnel.
These games are usually played with a large number of participants divided into teams, each with their own set of goals and instructions. Objectives vary from eliminating all opposing players to capturing an asset or location. Some games will run as timed events for many hours and points are awarded for achieving objectives, whereas other events will end after a certain criteria is met. It is not uncommon for games to span multiple days where players have the opportunity to camp overnight in the field of play while the game is running, adding a measure of excitement if they were to be attacked while asleep.
Copyright - me. Hope this helps.
Last edited by Gryphon; August 11th, 2012 at 17:48..