In the absence of realistic terrain or equipment, military organizations will often make use of a combat simulator as a method of training soldiers for varied combat environments.
Holographic projectors are used to create visual representations of opponents and obstacles. Kinetic barriers are then cast to prevent participants from passing through the obstacles and terrain. Kinetic barriers are also used to simulate weapon damage and shockwaves. However, while most trainers agree that pain is the best teacher, all government-sponsored combat simulators are required to make use of extensive safety protocols to prevent any serious, permanent damage to participants.