Both the military and the police use hundreds of equipment types – weapons, vehicles, appliances. Besides, there are hundreds of roles, all of them requiring special training. Last but not least, real-life situations often call for prompt response and right decision making.
Hence why military and police training programs are extremely costly and often dangerous. Training soldiers and police officers to use various weapons, drive vehicles, operate gadgets in battlefield or crime conditions requires massive investment and exposes both the trainees and the instructors to the risk of injury.