HRTA will be holding a lot more milsim games this year.  

"MilSim", short for Military Simulation, generally combines airsoft play with some military live-action role-playing elements. This type of play may be considered "hard core" by many players because of the above normal involvement required. Several goals or missions are assigned to each team, along with a basic load-out (i.e., supplys) of ammunition (6 millimeter bb's), rations, batteries, and other suitable equipment such as short-range radios and head-sets. Sometimes such equipment is provided whilst other times players may bring it at their own discretion.

The teams will remain in the field for the duration of play, only returning to a staging area or "safe zone" for special circumstances. Military simulation games often last several hours or days. For example, the large Berget annual event in Sweden lasts for six days with no breaks. In large scale MilSim operations, players may utilize vehicles such as painted vans and trucks. In some cases, such as Operation Irene (an annual MilSim held in the midwest U.S.), real APCs and tanks are used.